Calculate percentages instantly. Find what percent of a number is, percent change, and more.
A percentage is a number expressed as a fraction of 100. To find what percent X is of Y, divide X by Y and multiply by 100. For example, 30 is what percent of 200? Answer: 30/200 × 100 = 15%. To find X% of Y, multiply Y by X/100. For example, 15% of 200 = 200 × 0.15 = 30.
Percentage increase is calculated as: (New Value - Old Value) / Old Value × 100. If a price goes from $100 to $130, the increase is 30/100 × 100 = 30%. A decrease is the same formula — if the result is negative, it is a decrease.
Percentages are used everywhere in daily life: calculating tips at restaurants, figuring out discounts while shopping, understanding interest rates, interpreting statistics, grading school assignments, and analyzing sports statistics. Our percentage calculator handles all these scenarios instantly.