Like decimals and fractions, percentages are a way of expressing proportion. Proportion tells us how much of one thing there is in relation to the whole. The sign % stands for 'per cent'. Per cent, in ...

An amount can be increased or decreased by a certain percentage to change its size. A reverse percentage problem involves finding the original amount before a percentage increase or decrease. The ...

Proportional Representation (PR) is an electoral system whereby the composition of the elected body reflects the proportion of support gained by each political party standing in that election.