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Percentage Calculator

What is % of  ?
  %
is what percent of ?
  %
What is the percentage increase/decrease from
to  ?
 %

How to use Percentage Calculator.

It is simple and swift to use our Percentage Calculator.

Please follow the steps below:

Step 1: Use the boxes provided to fill in the numbers you are interested in

Step 2: Hit the ‘calculate’ button

Step 3: Here you go! Get your percentage change in the twinkling of an eye!

What is percentage?
Percentage is a special way of indicating hundredth parts of any quantity. A percentage is a number that indicates a fraction made up of hundred parts. It describes how many parts there are out of one hundred parts of a particular thing.

When percentage is used, the whole is regarded as being made up of a hundred equal parts. 100% represents the entire number, while 0% represents noting. If 50% of the spectators in a stadium are female, then for every 100 spectators in the stadium, 50 of them are female.

People often use the term ‘percentage ‘or symbol %. For instance, many companies use 20%, 30%, up to 70% etc. discount to persuade customers to buy their products or services. Likewise, someone may have 10% share in a business. Newspapers discuss a variety of issues such as GDP growth, interest rate, inflation rate, unemployment rate, tax, year-on-year sales and many others in percentage terms.

Working with percentages:
The sign % stands for ‘per cent’ which means ‘out of 100’. To understand percentages, all that needs to be remembered is that percent means ‘out of one hundred’. So,

100% means 100 out of 100
50% means 50 out of 100
10% means 10 out of 100
200% specifies twice a given quantity

Percentage example: 

Example 1:

Let us say you have 10 oranges and you are thinking of eating 4 now. If you eat 4 oranges, then you are eating 4 out of the whole 10 oranges. 10 oranges here represent 100%. What do 4 oranges represent here? They represent as follows:
4 / 10 x 100 = 40%

Let’s say you have eaten 40% of oranges, then your remaining oranges are 100% – 40% = 60%.

Example 2:

25% people of a city has watched a friendly football match between the UK and the USA. Let us calculate how many people have watched the match if the city’s population were 200,000.

25 / 100 x 200,000 = 50,000

Example 3:

The price of a £1.50 chocolate bar is increased by 20%. What is the new price?

Firstly, let us calculate 20% of £1.50 which is:

20 x 1.50 / 100 = 0.30

Secondly, add £0.30 to the original price of £1.50.
So, the new price is £1.50 + £0.30 = £1.80

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Last update: 08 September 2020 

Bibliography/Further Reading:

BBC (2020) What is a percentage?, available at: https://www.bbc.co.uk/bitesize/topics/znjqtfr/articles/z8ws3k7 (accessed 14 August 2020)

University of Leicester (2020) Working with percentages, available at: https://www2.le.ac.uk/offices/ld/all-resources/numerical-data/percentages (accessed 12 August 2020)