Percentage Calculator
Three percentage calculators in one: find X% of Y, find what percent X is of Y, and calculate percentage change between two numbers.
Last updated: · Standard arithmetic — no external data source required
15% of 200 = 30. Formula: 200 × (15 ÷ 100) = 30. This calculator also solves: "X is what percent of Y?" and "What is the percentage change from A to B?"
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Results
15% of 200
30.0000Common Percentages Quick Reference
| % | As Decimal | As Fraction | % of 200 |
|---|---|---|---|
| 5% | 0.0500 | 1/20 | 10.00 |
| 10% | 0.1000 | 1/10 | 20.00 |
| 15% | 0.1500 | 3/20 | 30.00 |
| 20% | 0.2000 | 1/5 | 40.00 |
| 25% | 0.2500 | 1/4 | 50.00 |
| 33.33% | 0.3333 | 1/3 | 66.66 |
| 50% | 0.5000 | 1/2 | 100.00 |
| 75% | 0.7500 | 3/4 | 150.00 |
How This Is Calculated
Three percentage formulas, all basic arithmetic:
What is X% of Y? → Y × (X / 100)X is what % of Y? → (X / Y) × 100% Change from A to B → ((B − A) / A) × 100Frequently Asked Questions
- What is 15% of 200?
- 15% of 200 = 30. Formula: 200 × (15/100) = 200 × 0.15 = 30.
- How do I calculate percentage?
- To find X% of Y: multiply Y by X/100. To find what percent X is of Y: divide X by Y, then multiply by 100. To find percentage change: (New - Old) / Old × 100.
- What is the percentage change from 100 to 125?
- The percentage change from 100 to 125 is +25%. Formula: (125 - 100) / 100 × 100 = 25%.