How is percentage change calculated?

Percentage change is ((new value − original value) ÷ original value) × 100. A positive result is an increase; a negative result is a decrease.

Yes. Enter whole numbers or decimals in either field. Results are shown with up to four decimal places when needed.

What if I divide by zero?

If the divisor is zero — for example, finding what percent X is of 0 — the calculator cannot produce a valid result and will show no answer.

Find percentages, percent of a number, and percentage increase or decrease between values.

Mode

Percentage (%)

Of number

20% of 150 = 30

1
Select a calculation mode
Choose X% of Y, X is what % of Y, or percentage change between two values depending on what you need to solve.
2
Enter your numbers
Fill in the two input fields labeled for your selected mode. Results update automatically as you type.
3
Read the result
The answer appears below the inputs — for example, 20% of 150, what fraction one number is of another, or the percent increase or decrease.
4
Switch modes for related problems
Use percent-of for discounts and tips, what-percent for share or completion rates, and percent change for price hikes or growth comparisons.

Select the X% of Y mode, enter the percentage in the first field and the number in the second. The result is (percentage ÷ 100) × number.

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