Quickly calculate percentage of any number, find percent increase or decrease, or work out discounts and markups with easy-to-use tools.
To calculate a percentage of a number, multiply the number by the percentage (written as a decimal). For example, 20% of 150 is 0.20 × 150 = 30.
To find what percent one number is of another, divide the first by the second and multiply by 100: (part ÷ whole) × 100.
To calculate increase or decrease, use: ((new - original) ÷ original) × 100.
0.15 × 80 = 12(25 ÷ 200) × 100 = 12.5%((65 - 50) ÷ 50) × 100 = 30%40 ÷ 0.20 = 200Percentages are used everywhere — from calculating tips and discounts to understanding test scores and finance rates.
Multiply the price by the percent (as decimal) and subtract it. Example: 30% off $200 → 0.30 × 200 = 60, so final price is $140.
(45 ÷ 180) × 100 = 25%
Multiply the number by 1 + percent as decimal. For example, increase 100 by 25% → 100 × 1.25 = 125
Multiply the number by 1 + percent as decimal. For example, increase 100 by 25% → 100 × 1.25 = 125
To calculate a percentage, use the formula (part / whole) * 100. This applies when determining what percent one number is of another. To find a value from a percentage, use (percent / 100) * total.
0.30 * 120 = 36(50 / 200) * 100 = 25%((100 - 80) / 80) * 100 = 25%40 / 0.20 = 200