Add, subtract, multiply and divide fractions and mixed numbers.
Fractions appear everywhere — in recipes, construction measurements, financial ratios, music timing, and school math. Our Fraction Calculator performs all four arithmetic operations on fractions and mixed numbers, shows the step-by-step process, and automatically simplifies the result to its lowest terms.
Whether you're helping a child with homework, scaling a recipe, calculating a material cut, or checking your algebra work, this tool gives you the complete answer with the work shown — so you understand the process, not just the result.
Enter two fractions (or mixed numbers). Select the operation: add, subtract, multiply, or divide. The calculator finds the least common denominator for addition and subtraction, applies the appropriate formula, and simplifies the result using the greatest common divisor (GCD).
Simplification: Divide numerator and denominator by GCD
Scenario: A recipe calls for 2/3 cup of butter and 3/4 cup of milk. You want to make 1.5 batches and need to know the total combined liquid.
Step 1 — Scale each by 1.5 (or 3/2):
Step 2 — Add them:
1 + 9/8 = 8/8 + 9/8 = 17/8 = 2 1/8 cups total
Answer: You need 2 and 1/8 cups of combined liquid ingredients. The step-by-step view in the calculator shows every GCD simplification so you can follow along.