How to calculate percentages (quick refresher)
- X% of Y:
(X ÷ 100) × Y - X is what percent of Y:
(X ÷ Y) × 100 - Percentage change:
((New − Old) ÷ Old) × 100
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Percentage Calculator | % Increase, Decrease, & more
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FAQs
How do I calculate percentage increase?
Use (New − Old) ÷ Old × 100. Enter both values and the calculator shows the exact percentage change.
Is percentage increase the same as growth rate?
For a single period, yes. Over multiple periods, use compound growth (CAGR) to include compounding.
How can I reverse a percentage increase?
Divide the new value by (1 + increase%). For example, $120 after a 20% increase means $120 ÷ 1.2 = $100 original.