Fraction Calculator
Perform arithmetic on two fractions — add, subtract, multiply, or divide. Results shown in simplified form.
Results
What is it?
A fraction represents a part of a whole — the numerator (top) divided by the denominator (bottom). This calculator performs the four basic arithmetic operations between two fractions and shows the unsimplified result plus its decimal equivalent.
How to use
Enter the numerator and denominator for fraction A, select your operation, then enter the numerator and denominator for fraction B. The result numerator and denominator appear immediately. To simplify, divide both numbers by their Greatest Common Factor (GCF).
Example scenario
Adding ½ + ⅓: Enter num1=1, den1=2, operation=Add, num2=1, den2=3. The calculator cross-multiplies to give numerator = 1×3 + 1×2 = 5 and denominator = 2×3 = 6, so the result is 5/6 ≈ 0.833333.
Pro tip
The Least Common Denominator (LCD) method gives a simplified result directly: find the LCM of both denominators, scale each numerator accordingly, then add or subtract. After computing, always divide the result fraction by the GCF of its numerator and denominator to get the fully simplified form.