Percentage Calculator
Three percentage questions, answered instantly — with the formula shown for every result, so you can check the working yourself.
1Type the percent.
2Type the number.
3See your answer.
1 · What is X% of Y?
For tips, discounts, tax and “how much is that share?” — e.g. what is 20% of 150?
30
Formula: 20 ÷ 100 × 150 = 30
2 · X is what percent of Y?
For scores, completion and shares — e.g. 45 is what percent of 180?
25%
Formula: 45 ÷ 180 × 100 = 25%
3 · Percentage increase / decrease
How much something grew or shrank, in percent — e.g. from 80 to 100.
+25% increase
Formula: (100 − 80) ÷ 80 × 100 = +25%
Change in value+20
New value as % of the old125%
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Quick reference — percent of 100
1% of 1001
10% of 10010
25% of 100 (a quarter)25
50% of 100 (half)50
75% of 100 (three quarters)75
100% of 100 (the whole thing)100