How do I calculate a percentage of a number?▾
Multiply the number by the percentage and divide by 100. For example, 25% of 200 is 25 × 200 ÷ 100 = 50.
How do I calculate percentage increase?▾
Subtract the old value from the new value, divide by the old value and multiply by 100. From 50 to 60 is (60 − 50) ÷ 50 × 100 = 20% increase.
Is a 50% loss recovered by a 50% gain?▾
No. If 100 falls 50% to 50, it needs a 100% gain to return to 100, because the percentage is calculated on a smaller base.
What is the difference between percent and percentage points?▾
A move from 10% to 12% is a 2 percentage-point rise but a 20% relative increase.
