Math
Percentage Increase Calculator
Work out how much a value has grown in percentage terms, from an old value to a new value.
Formula
Percentage increase = ((new value − old value) ÷ old value) × 100.
How it works
Enter the old and new values. The calculator finds the difference, divides it by the old value, and converts it to a percent. A positive answer means growth.
FAQs
What does the Percentage Increase do?
It takes the values you enter and works out the percentage increase for you, showing the result straight away.
What should I enter?
Enter ordinary numbers in the boxes above. If a value does not make sense for this calculation, the page will ask you to check it instead of showing a wrong answer.
Can I use the result for homework or everyday maths?
Yes. It is a general-purpose maths helper; for exam or professional work, still check the steps against your own working.