Percentage Calculator (all the common sums)
All the percentage sums in one place. Fill in any row and the answer appears instantly.
How it works
X% of Y = Y × X ÷ 100.
X as a percentage of Y = X ÷ Y × 100.
Percentage change = (new − old) ÷ old × 100.
Frequently asked questions
How do I add 20% to a number?+
Multiply by 1.2. To take 20% off, multiply by 0.8.