Percentage Change & Reverse Percentages

Increases, decreases, and the sneaky ones where you work backwards to the original amount.

Percentage Change

How to express any increase or decrease as a percentage using the change ÷ original × 100 formula, with profit and loss examples.

Percentage Increase and Decrease

How to find a percentage of an amount and increase or decrease by a percentage, including the quick multiplier method.

Reverse Percentages

Learn how to work backwards from a percentage to find the original amount, with a clear worked example from Nova.