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Percentage Calculator
Three calculations in one: find what X% of a number is, calculate what percentage one number is of another, or find the percentage change between two values.
Frequently Asked Questions
How do I calculate what percentage one number is of another?+
Divide the part by the whole and multiply by 100. For example, 45 out of 200 = (45 ÷ 200) × 100 = 22.5%. The calculator handles this automatically in the "what % of" mode.
How do I calculate percentage increase or decrease?+
Percentage change = ((New Value − Old Value) / Old Value) × 100. A positive result is an increase; a negative result is a decrease. For example, from 80 to 100 = ((100 − 80) / 80) × 100 = 25% increase.
How do I find the original value before a percentage change?+
If a price after a 20% increase is ₹1,200, the original is ₹1,200 / 1.20 = ₹1,000. In general: Original = Final / (1 ± percentage/100). Use the reverse percentage mode in this calculator.