Percentage Change Calculator (increase/decrease)
See how much a value went up or down in percentage terms.
How it works
Percentage change = (new − old) ÷ old × 100.
Percentage difference (no direction) = |a − b| ÷ average(a, b) × 100.
Frequently asked questions
Why isn't a 50% fall undone by a 50% rise?+
Because the rise is on a smaller number: £100 −50% = £50, then +50% = £75.