3 Answers

Percent means "out of 100".
A percentage is a fraction expressed out of 100.
So 50% = 50/100 = 1/2 = one half
Percentages are used to compare how big numbers are compared with other numbers.

A percentage is the top part of a fraction whose bottom part is 100.
So 50% means 'half of' and 25% means 'a quarter of'. 100% means the complete quantity. 
In mathematics, a percentage is a number or ratio as a fraction of 100. It is often denoted using the percent sign, “%”,
For example, 30% (read as “thirty percent”) is equal to 30/100, or 0.3
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.
Suggested reading…
Work out a percentage increase or decrease
Percentage Increase or Decrease
In your GCSE Maths exam you will need to know how to work out a percentage increase or decrease multiple times! So, it is very important that you are comfortable with iworking out a percentage increase or decrease!
Percentage Increase
Let’s say a shop owner needs to increase all their prices by 5%.
To do this, for each price they work out 5% of it, and then add it on.
Example: 5% of £200 is £10, so to increasing £200 by 5% gives £210.
With a calculator, a faster way of doing this is just to multiply £200 x 1.05 = £210
Percentage Decrease
To perform a percentage decrease, simply subtract the 5%
Example: 5% of £200 is £10, so to decreasing £200 by 5% gives £190.
With a calculator, a faster way of doing this is just to multiply £200 x 0.95 = £190
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