% Percentage Calculator
Six percentage calculators in one — from basic X% of Y to percentage change, discounts, tips, and more. All instant, all in-browser.
6 Calculators
Instant Results
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1. What is X% of Y?
2. X is what % of Y?
3. Percentage Change
4. Add / Remove a Percentage
5. Discount Calculator
6. Tip Calculator
FAQ
How do I calculate X% of Y?
Multiply Y by X and divide by 100. For example, 15% of 200 = (15 × 200) / 100 = 30.
How do I find what percentage X is of Y?
Divide X by Y then multiply by 100. For example, 25 out of 200 = (25 / 200) × 100 = 12.5%.
How do I calculate percentage change?
Percentage change = ((New − Old) / |Old|) × 100. A positive result means an increase; negative means a decrease.
How is a discount applied?
Final price = Original × (1 − Discount% / 100). For example, a 20% discount on $80 = $80 × 0.80 = $64.
How is a tip calculated?
Tip amount = Bill × (Tip% / 100). Total = Bill + Tip. Per person = Total / Number of people.