Calculate percentages, percentage proportions, and percentage increases or decreases effortlessly with our free interactive calculator.
1. What is X% of Y?
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2. X is what percent of Y?
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3. Percentage Increase or Decrease
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How to Calculate Percentages (Formulas)
1. What is X% of Y?
To find a percentage of any number, divide the percentage by 100 and multiply by the base number:
Formula: Result = (X / 100) * Y Example: 15% of 200 = (15 / 100) * 200 = 0.15 * 200 = 30
2. X is what percent of Y?
To find the proportion one number represents of another, divide the part by the whole and multiply by 100:
Formula: Percentage = (X / Y) * 100 Example: 25 out of 100 = (25 / 100) * 100 = 25%
3. Percentage Increase or Decrease
To calculate the rate of change between an original value and a new value:
Formula: Change% = ((New Value - Original Value) / |Original Value|) * 100 Example: From $50 to $75 = ((75 - 50) / 50) * 100 = (25 / 50) * 100 = +50% Increase