1
What is X% of Y?
% of
= ?
2
X is what % of Y?
is what % of
?
3
Percentage Change
How It Works
X% of Y
Result = (X / 100) × Y
Multiply Y by the decimal form of the percentage.
X is what % of Y
Result = (X / Y) × 100
Divide the part by the whole, then multiply by 100.
Percentage Change
Change = ((New − Old) / |Old|) × 100
Positive = increase, Negative = decrease.