What is X% of Y?
e.g. What is 20% of 150? → 30
% of =
X is what % of Y?
e.g. 30 is what % of 150? → 20%
is what % of =
Percentage change
e.g. From 80 to 100 = +25% increase
From to =
Increase / decrease by %
e.g. 200 increased by 15% = 230
by %=
X is Y% — what is 100%?
e.g. 30 is 20% — the whole is 150
is % → whole =
Percentage difference
Difference between two values as a %
Between and =
Calculation history
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