Percentage Calculator

Calculate X% of Y, what % X is of Y, and A→B change %.

Percent (X) (%)

Of value (Y)

Handles everyday ratio and increase/decrease calculations.

Finds what value a given percentage of a whole is, what percentage a part is of a whole, or the percent change from one value to another.

Find the value that is a given percentage of a whole.20% of 100 is 20.
Find what percentage a part is of a whole.20 out of 100 is 20%.
Find how much a value increased or decreased from a base to a new value.From 100 to 150 is a 50% increase.
Find the new value after a given percent increase or decrease.100 increased by 20% is 120.

Percent: Percent (from Latin per centum "by the hundred") is a ratio expressed as a fraction of 100. The symbol is %. For example, 50% means 50/100, or 0.5. Values above 100% (e.g. 150%) or negative (e.g. -10%) are also used.
Per mille (‰): Per mille (permille, permill) is a ratio per 1,000, denoted by ‰. It is used for things like salinity (e.g. seawater), railway gradients, and some tax rates.
Basis point (‱): A basis point is one hundredth of a percent (1‱ = 0.01%). It is commonly used in finance to describe interest rate or yield changes (e.g. "rates rose 25 basis points").