Calculate percentages instantly. Find X% of Y, calculate percentage change, or solve any percentage problem with step-by-step explanations.
Result
50.00
Select a calculation type, then enter your values
Step 1: Convert percentage to decimal
25% = 25 / 100 = 0.2500
Step 2: Multiply by the base number
0.2500 × 200 = 50.00
Result: 25% of 200 = 50.00
= 0.1 = 1/10
= 0.25 = 1/4
= 0.333 = 1/3
= 0.5 = 1/2
= 0.667 = 2/3
= 0.75 = 3/4
= 1.0 = whole
= 2.0 = double
Quick-start with common scenarios
Test your skills with practice problems
Practice with 5 problems to test your understanding.
Result
50.00
To calculate a percentage of a number, multiply the number by the percentage and divide by 100. For example, 25% of 200 equals (25 x 200) / 100 = 50. To find what percentage one number is of another, divide the part by the whole and multiply by 100. For percentage change, use: ((New - Old) / Old) x 100.
A percentage is a number expressed as a fraction of 100, represented by the symbol %. It indicates how many parts per hundred of a quantity. Percentages are used to express proportions, compare ratios, and calculate changes in values across finance, statistics, and everyday calculations.
To calculate a percentage of a number, multiply the number by the percentage and divide by 100. For example, 25% of 200 equals (25 x 200) / 100 = 50. To find what percentage one number is of another, divide the part by the whole and multiply by 100. For percentage change, use: ((New - Old) / Old) x 100.
To find what percent X is of Y, divide X by Y and multiply by 100. The formula is: Percentage = (X / Y) × 100. For example, if you want to know what percent 25 is of 200, calculate (25 / 200) × 100 = 12.5%.
To find X percent of Y, multiply Y by X and divide by 100. The formula is: Result = (X × Y) / 100. For example, to find 15% of 200, calculate (15 × 200) / 100 = 30.
Percentage change = ((New Value - Old Value) / Old Value) × 100. A positive result indicates an increase, while a negative result indicates a decrease. For example, if a price goes from $50 to $60, the change is ((60-50)/50) × 100 = 20% increase.
Percentage represents a portion of 100 (e.g., 50% means 50 out of 100). Percentile indicates a position in a distribution - for example, the 90th percentile means you scored higher than 90% of the group. They serve different purposes in statistics.
To convert a decimal to a percentage, multiply by 100 and add the % symbol. For example, 0.25 becomes 25% (0.25 × 100 = 25). To convert a percentage to a decimal, divide by 100.
Last updated: 2025-01-15
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Result
50.00