1. What is X% of Y?
% of
=
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2. X is what % of Y?
is what % of
=
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3. % change from X to Y
From
to =
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4. Increase X by Y%
increased by
=
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5. Decrease X by Y%
decreased by
=
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6. X is Y% — what is 100%?
is
% — 100% =
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Frequently Asked Questions
How do I calculate percentage increase? ▼
Use calculator #3 above. Enter the original value as X and the new value as Y. A positive result means an increase, a negative result means a decrease. Formula: ((Y - X) / X) × 100.
How do I find what percentage one number is of another? ▼
Use calculator #2. For example, "15 is what % of 60?" — enter 15 as X and 60 as Y. The answer is 25%, since 15/60 × 100 = 25.