Percentage calculator

The 3 percentage calculations

• % of a number — e.g. 20% of 150 = 30 (handy for a discount).
• Proportion — e.g. 30 out of 120 = 25 %.
• Change — e.g. from 80 to 100 = +25 % (increase or decrease).

Frequently asked questions

How do I work out a discount ?

Use “% of a number” : the result is the discount amount to subtract from the price.