Percentage Calculator

Calculate X% of Y, what percent X is of Y, percentage increase or decrease, and add or subtract a percentage.

20% of 150
30
20 is what percent of 150
13.3333%
Change from 20 to 150
650%
150 increased by 20%
180
150 decreased by 20%
120

Formula

X% of Y = X × Y ÷ 100. X as a percent of Y = X ÷ Y × 100. Percentage change = (New − Old) ÷ |Old| × 100.

About this calculator

Enter two numbers once and read all five common percentage answers together.

Amounts are shown without a currency symbol, so the calculator works for any currency: enter all values in the same one.

Frequently asked questions

How do I work out a percentage increase?

Subtract the old value from the new value, divide by the old value and multiply by 100. From 80 to 100 is (100 − 80) ÷ 80 × 100 = 25%.

Is a 50% rise followed by a 50% fall back to the start?

No. 100 rising 50% is 150; 150 falling 50% is 75. Percentages apply to different bases each time.

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