Percentage calculator
X% of Y, what percent, percent change, and adding or removing a percentage.
What is X% of Y?
% of
X is what percent of Y?
is what % of
Percent change from X to Y
from to
Add or remove a percentage
± %
Percent change uses the old value as the base. Removing 8% then adding 8% doesn't get you back where you started, because the base changes.
About this calculator
Answer everyday percentage questions: what is X% of Y, what percent is one number of another, the percent increase or decrease between two values, and a price with a percentage added or removed (such as sales tax or a discount).
Formula
Percent change = new − oldold × 100
- To remove a percentage that was added, divide by (1 + rate), not multiply by (1 − rate).
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