Percentage Calculator
Solve all types of percentage problems with this versatile calculator. Find what percent one number is of another, calculate percentage increase or decrease, find a percentage of a number, or work backwards from a percentage. Essential for finance, shopping, and academics.
What is X% of Y?
Quick Examples
15% of 200
= 30
25 is what % of 200?
= 12.5%
Change: 80 to 100
= +25%
FAQ
How do I calculate percentage of a number?
To find X% of Y, multiply Y by X and divide by 100. For example, 25% of 80 = (80 x 25) / 100 = 20. Alternatively, convert the percentage to a decimal (0.25) and multiply.
How do I calculate percentage change?
Percentage change = ((New Value - Old Value) / Old Value) x 100. A positive result is an increase, negative is a decrease. For example, from 50 to 75: ((75-50)/50) x 100 = 50% increase.
What is reverse percentage calculation?
Reverse percentage finds the original number before a percentage was applied. If a price after 20% discount is $80, the original was $80 / 0.8 = $100.