How is the concept on percentage applicable in our daily life?
"Percentage" is the "result obtained by multiplying a quantity by a percent". So 10 percent of 50 apples is 5 apples: the 5 apples is the percentage.



In mathematics, a percentage is a way of expressing a number as a fraction of 100. It is denoted using the percent sign, "%". For example, 45% is equal to 45/100, or 0.45.
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Percentages are often used for calculations involving money in daily life.The prices of most quantities increase (or decrease) by a percentage over time. The changes in prices are often reported in newspapers as a percentage increase (or decrease). Profit, loss, discount, commission and rates of interest can all be expressed as percentages. Here is an example:

Example: The price of a calculator increases from $15 to $18. Express this increase as a percentage of the old price.
Solution:
The price of a calculator increases from $15 to $18. Express this increase as a percentage of the old price.
Solution:

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Percentage as a fraction

A percent is equivalent to a fraction with denominator 100.

Example:5% of something = 5/100 of that thing
Example:What is 13/25 converted to %?
Solution: 100/25=4
13x4=52
13/25=52/100=52%

Percentage as a decimal

Percent and hundredths are basically equivalent. This makes conversion between percent and decimals very easy.

To convert from a decimal to a percent, just move the decimal 2 places to the right. For example, 0.15 = 15 hundredths = 15%.

Example:0.06%=0.0006
Question: Express 90 1/4 as a decimal & percentage.
Answer. 90 1/4=90.25=0.9025.

Interest

Interest is a fee paid to borrow money. It is usually charged as a percent of the total amount borrowed. The percent charged is called the interest rate. The amount of money borrowed is called the principal. There are two types of interest, simple interest and compound interest.

Example: A bank charges 7% interest on a $1000 loan. How much will a person have to pay if he borrows $1000?

Answer: 7% x 1000 = 70
1000 + 70 = 1070
Alternate method: 107% x 1000 = 1070

Percent increase and decrease

Percent increase and decrease of a value measure how that value changes, as a percentage of its original value.

Example: A book costs $900 in 1990. In 2010, its value is $1900. What is the percent increase in the book's price?

Answer: 1900 - 900 = 1000
1000/900 x 100 ~111%

Percent discount

A discount is a decrease in price, so percent discount is the percent decrease in price.

Example: Chocolate bars normally cost 80 cents each, but are on sale for 40 cents each.
What is the discount?
Answer: (80-40)/80 = 1/2 = 50%

Percentage

The term 'per cent' is derived from the Latin phrase 'per centrum'. It means 'per hundred' or 'out of 100'.
Percentage means the number of parts of out of 100 parts the unit for percentage is %
To change percentage to fraction,divide the number by 100.
To change fractions to percentage,multiply the fraction by 100
To convert percentage to decimal,shift the decimal point twice to the left.
To convert decimal to percentage,shift the decimal point twice to the right.
To express part of a whole as percentage,ensure both the quantities are in the same units(e.g. kg,g,cm,m,)and multiply the fraction by 100%

Examples of percentage

>A pen with a price tag of $2 and sold at a 10% discount will only cost only about $1.80.
This means , for every 100 cents ,you pay 10 cents less. Proportionally, for 200 cents ($2),you will therefore pay 20 cents less.
>In a packet of sweets,1 in every 20 sweets is a mint sweet.Then it follows that 5 in every 100 sweets are mint sweets.
We can say that 5% of the sweets are mint.A percentage is simply a ratio in which the second number is 100.
This can also be represented by a fraction whose denominator is 100. For example:
9%(percentage)=0.09(decimal)=9:100(ratio)=9/100(fraction)

What Is Percentage?

A percentage is a certain number of hundredths of something. For instance, if you have a hundred sheep, and you give five of them to the government for taxes, that is five percent (5%). If you have only ten sheep and you give five of them for taxes, that is 50%.
In mathematics, a percentage is a way of expressing a number as a fraction of 100 (per cent meaning "per hundred" in Latin). It is often denoted using the percent sign, "%", or the abbreviation "pct". For example, 45% (read as "forty-five percent") is equal to 45/100, or 0.45 .
Percentages (%)
When you say "Percent" you are really saying "per 100"
Example:
So 50% means 50 per 100 And 25% means 25 per 100
(50% of this box is green)
(25% of this box is green)
Pictures about percentage
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What is percentage?
In mathematics, a percentage is a way of expressing a number as a fraction of 100 (per cent meaning "per hundred" in Latin). It is often denoted using the percent sign, "%", or the abbreviation "pct". For example, 45% (read as "forty-five percent") is equal to 45/100, or 0.45 .
Percentages are used to express how large/small one quantity is, relative to another quantity. The first quantity usually represents a part of, or a change in, the second quantity, which should be greater than zero. For example, an increase of $ 0.15 on a price of $ 2.50 is an increase by a fraction of 0.15/2.50 = 0.06. Expressed as a percentage, this is therefore a 6% increase.
Although percentages are usually used to express numbers between zero and one, any dimensionless proportionality can be expressed as a percentage. For instance, 111% is 1.11 a
reference by: http://en.wikipedia.org/wiki/Percentage
http://www.youtube.com/watch?v=pOrQ2hEoRPA

Math Basics : How to Find the Percent of a Number

Singapore religion by ethnic group.png
Singapore religion by ethnic group.png

Source: Census 2000.[4[[http://en.wikipedia.org/wiki/Demographics_of_Singapore#cite_note-3|]]]

This is the percentages of people with religions in Singapore, based on their races.


external image images?q=tbn:ANd9GcRvc7fuXHo6EGKhC1zs_2XzuSRAum3EMBei_P_OY3e8idUazK4Qexternal image human-body-72-water.jpgThese shows percentage of water in our body and percentage of different
gases around us.



Percent means “for every 100” or "out of 100." The (%) symbol as a quick way to write a fraction with a denominator of 100. As an example, instead of saying "it rained 14 days out of every 100," we say "it rained 14% of the time."



  • Read more: http://www.answers.com/topic/percentage#ixzz1HFAEuTsv

  • Many people do understand what percentage is about.

  • If you see a sales offer with 50% discount, you will know that it is cheaper by half.
  • If the offer is with 40% less, you will also realise that is a good deal since it is almost half the original price.

  • But what is this percentage in detail?

  • A mark of 4 / 5 is reflected as a fraction.
  • A learned maths person will understand that it is (4 /5) x 100 = 80%
  • If you tell a student that he achieved 50 marks. Is that enough?
  • The information will not be enough as the total score is not known (unless using the default told before hand).
  • Thus a mark of 50 upon 50, and a mark of 50 upon 100 means different story altogether.
  • A percentage will always reflect better information since 80% means 80 / 100.
  • The base of 100 is taken as the default.
  • The actual base number is immaterial in this matter.
  • An information of 50 marks compared to 50% showed the power of using percentage.
  • For absolute marks, you need to tell the total marks to form a complete message.
  • Using percentage, the fraction part of the calculation can be ignored.
  • Percentage and fraction are related. But percentage used a common base number (100) to commonise the value.
  • For comparison sake, percentage, thus stand a more proper way to tell the result.

  • For example: Its easier to express 4/5 slices of a cake using percentage than in fraction because expressing in fraction,
  • the denominator of the fraction can be any number while expressing in percentage is always equals to 80/100 which is 80%(4/5 slices of a cake).


  • Read more: http://mathsisinteresting.blogspot.com/2009/06/what-is-percentage.html




  • Percentage is a way of expressing a number as a fraction of 100.
  • Percentages are used to express how large/small one quantity is, relative to another quantity. The first quantity usually represents a part of, or a change in, the second quantity, which should be greater than zero.
  • Although percentages are usually used to express numbers between zero and one, any dimensionless proportionality can be expressed as a percentage. For instance, 111% is 1.11 and –0.35% is –0.0035.
external image discount.jpgImage from http://www.laiwahrestaurant.com/




PERCENTAGES

Percentages are an important part of our everyday lives.
Percentage is a very handy way of writing fractions.
Percentages can be compared more easily than fractions.
Shops advertise discounts on products. These discounts are percentages.
"Up to 50% off marked prices"
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Financial institutions quote interest charged to the client on loans, or interest paid for money invested, as a percentage.
"Housing Loans-4.95% p.a. for the first 12 months"
Interest paid may be as Simple Interest or Compound Interest.

Companies describe their success or failure as an increase or decrease in profit levels.
"C-Company profit down by 15% for the last financial year"

A salesperson may be given a commission as payment for selling goods. The commission can be a percentage of the sales made.
"Position Vacant: 20% commission on all sales to the successful applicant."


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