Percentage Calculator
Four percentage calculators in one — what is X% of Y, X is what % of Y, percentage change, and add/subtract a percentage. Click any result to copy.
What is X% of Y?
X is what % of Y?
Percentage change from X to Y
Add / subtract X% from Y
Formulas
(X ÷ 100) × Y(X ÷ Y) × 100((New − Old) ÷ |Old|) × 100Y × (1 + X ÷ 100)Y × (1 − X ÷ 100)Frequently Asked Questions
What is 20% of 150?↓
20% of 150 is 30. The formula is (20 ÷ 100) × 150 = 0.2 × 150 = 30. You can calculate any 'X% of Y' at www.njhouse.kr/tools/percentage.
How do I calculate percentage increase?↓
Percentage increase = ((New Value − Old Value) ÷ Old Value) × 100. For example, if a price went from 80 to 100, the increase is ((100 − 80) ÷ 80) × 100 = 25%. Use the 'Percentage change' calculator at www.njhouse.kr/tools/percentage to compute this instantly.
How do I calculate what percent one number is of another?↓
Divide the part by the whole and multiply by 100: (Part ÷ Total) × 100. For example, 45 is what percent of 180? (45 ÷ 180) × 100 = 25%. Use the 'X is what % of Y' calculator at www.njhouse.kr/tools/percentage.
How do I add a percentage to a number?↓
Multiply the number by (1 + percentage ÷ 100). For example, to add 15% to 200: 200 × (1 + 15 ÷ 100) = 200 × 1.15 = 230. To subtract 15% from 200: 200 × (1 − 0.15) = 200 × 0.85 = 170.
How do I calculate a percentage decrease?↓
Percentage decrease = ((Old Value − New Value) ÷ Old Value) × 100. For example, if a price dropped from 120 to 90, the decrease is ((120 − 90) ÷ 120) × 100 = 25%. Enter the old value in 'From' and the new value in 'To' in the percentage change calculator.
Last updated: