Math
Fraction Calculator
Add, subtract, multiply, or divide two fractions. Shows step-by-step solution.
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Result
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Step-by-Step Solution
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Fraction Rules
Addition & Subtraction
a/b ± c/d = (a×d ± c×b) / (b×d)
Find common denominator, then add/subtract numerators.
Multiplication
a/b × c/d = (a×c) / (b×d)
Multiply numerators together, denominators together.
Division
a/b ÷ c/d = (a×d) / (b×c)
Multiply by the reciprocal of the divisor.
Simplification
a/b → (a÷GCD) / (b÷GCD)
Divide both by their greatest common divisor (GCD).
Common Fraction Equivalents
| Fraction | Decimal | Percent |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.333… | 33.3% |
| 2/3 | 0.666… | 66.7% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 1/8 | 0.125 | 12.5% |
| 3/8 | 0.375 | 37.5% |
| 5/8 | 0.625 | 62.5% |
| 7/8 | 0.875 | 87.5% |
Tips
- Enter negative numerators for negative fractions (e.g. −1/2).
- Whole numbers work too — enter the number as numerator and 1 as denominator.
- Results are always simplified to lowest terms automatically.
- If the result is a whole number, the denominator shows as 1.