The four percentage questions everyone searches
Percent of, percent change, discount, and what-percent cover most homework and shopping math.
Remember: percentage points ≠ percent change.
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Percentage Calculator
What is X% of Y? Percent change, discount, and reverse percentage.
Results
20% of 150
30
Formula
20% × 150 = 30
What this means
Percentage math tips
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Percent change vs points
Going from 10% to 15% interest is a 5 percentage-point increase but a 50% relative increase — wording matters in finance and grades.
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Discount stacking
Two 20% discounts do not equal 40% off — the second applies to the already-reduced price.
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