Percentages are a way of representing parts of numbers, similar to fractions or decimals. In percentages, the parts of numbers are shown as parts of one hundred.

Per cent means per hundred, e.g. 10% = 10⁄100. 

What is 25% of 90?

First, divide 90 by 100 to work out 1% of 90:
90 ÷ 100 = 0.9
We want to find 25% of 90 so next we multiply 0.9 by 25:
0.9 x 25 = 22.5 so, 25% of 90 is 22.5.

 

Some fractions represented as decimals and as percentages: 

1⁄2 = 0.5 = 50%

1⁄4 = 0.25 = 25%

1⁄3 = 0.333 = 33.3%