Percentage Calculator

Calculate Percentages Easily

Use our free tools to solve common percentage problems. Enter your values and get instant, accurate results.

Percentage of a Number

Common
What is
%
of ?
Answer
-

Find the Percentage

is what % of ?
Answer
-

Find the Whole

is
%
of what?
Answer
-

Percentage Change

Increase/Decrease
Change
-

Percentage Difference

Value 1
Value 2
Difference
-
Calculated as the absolute difference between two numbers divided by the average of those two numbers.

Understanding Percentages

What is a Percentage?

A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%". For example, 45% (read as "forty-five percent") is equal to 45/100, or 0.45.

Percentages are used to express how large or small one quantity is relative to another. The first quantity usually represents a part of, or a change in, the second quantity, which should be greater than zero.

Common Uses

  • Discounts: "30% off" sale prices.
  • Tips: Calculating 15% or 20% gratuity at restaurants.
  • Finance: Interest rates on loans and savings.
  • Statistics: Growth rates, polls, and survey results.

The Formula

The basic formula to find a percentage of a number is:
P% * X = Y
Convert the percentage to a decimal (divide by 100), then multiply by the whole number.