Fraction Calculator
Enter two fractions and an operation to get the result, automatically simplified to lowest terms.
Overview
Fraction arithmetic requires a common denominator for addition and subtraction, and the raw result is rarely in its simplest form — 6/8 is correct but not as useful as 3/4. This tool does the arithmetic and then simplifies the result using the greatest common divisor, so the answer is always in lowest terms, alongside its decimal equivalent.
Examples & Sample Data
Addition
1/4 + 1/3
7/12 (≈0.5833)
Multiplication
2/3 × 3/4
1/2 (≈0.5000)
How It Works
- Enter the numerator and denominator of the first fraction.
- Choose an operation: add, subtract, multiply, or divide.
- Enter the numerator and denominator of the second fraction.
- The simplified result and its decimal equivalent appear instantly.
Common Use Cases
Recipe scaling
Combine or scale fractional recipe measurements like 1/2 cup + 1/3 cup.
Homework checking
Verify a fraction arithmetic result and see it in simplified form.
Tips & Best Practices
- A negative fraction can be entered with a minus sign on either the numerator or denominator — the sign is normalized in the result.
Frequently Asked Questions
No. Every calculation runs locally in your browser.
The tool shows an error, since division by zero is undefined.
Yes — enter the whole number as the numerator with a denominator of 1.
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