Fraction Calculator
Add, subtract, multiply, and divide fractions
Calculator
Fraction Operations
Decimal to Fraction
Fraction Rules
- • Add/Subtract: Need common denominator first
- • Multiply: Top × Top, Bottom × Bottom
- • Divide: Flip second fraction, then multiply
- • Always simplify by dividing by GCD
How to Use
Calculate with fractions
Enter fractions
Input two fractions to calculate
Select operation
Choose add, subtract, multiply, or divide
View result
See answer as fraction and decimal
See simplification
View fully reduced form
Frequently Asked Questions
Find common denominator, adjust numerators, add. Example: 1/4 + 1/3. Common denominator = 12. 1/4 = 3/12, 1/3 = 4/12. 3/12 + 4/12 = 7/12. If denominators are same, just add numerators: 2/5 + 1/5 = 3/5.
Multiply numerators together and denominators together. 2/3 × 3/4 = 6/12 = 1/2. Simplify by canceling common factors first: 2/3 × 3/4 = (cancel 3s) = 2/4 = 1/2.
Multiply by the reciprocal (flip the second fraction). 2/3 ÷ 4/5 = 2/3 × 5/4 = 10/12 = 5/6. Remember: "Keep, Change, Flip" - keep first fraction, change ÷ to ×, flip second fraction.
Divide numerator by denominator. 3/4 = 3 ÷ 4 = 0.75. Some fractions are repeating: 1/3 = 0.333... Common ones: 1/2=0.5, 1/4=0.25, 1/5=0.2, 1/8=0.125.