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Fraction Calculator

Add, subtract, multiply fractions

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Formula

Additiona/b + c/d = (ad + bc) / bd
Subtractiona/b − c/d = (ad − bc) / bd
Multiplicationa/b × c/d = ac / bd
Divisiona/b ÷ c/d = ad / bc

All results are simplified using the Greatest Common Divisor (GCD).

How to Use

  1. Select the operation (+, −, ×, ÷) using the tabs
  2. Enter the numerator and denominator for the first fraction
  3. Enter the numerator and denominator for the second fraction
  4. Press Calculate to see the simplified result

FAQ

How do you add fractions with different denominators?

Find a common denominator by multiplying the denominators together, convert each fraction, then add the numerators. For example, 1/2 + 1/3 = 3/6 + 2/6 = 5/6.

How do you simplify a fraction?

Divide both the numerator and denominator by their Greatest Common Divisor (GCD). For example, 8/12: GCD(8,12) = 4, so 8/12 = 2/3.