Percentage Calculator

Calculate percentages, percentage change, discounts, and more

What is X% of Y?
of
=
30
X is what percent of Y?
is what % of
=
15%
Percentage Increase / Decrease
→
+25%
Discount Calculator
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How to Calculate Percentages

To find X% of Y: multiply Y by X/100. For example, 15% of 200 = 200 × 0.15 = 30.

To find what percent X is of Y: divide X by Y and multiply by 100. For example, 30/200 × 100 = 15%.

Percentage Change Formula

Change % = ((New - Old) / Old) × 100

Positive result = increase. Negative = decrease.

Common Percentage Uses

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