Add, subtract, multiply or divide two fractions and reduce the result to lowest terms.
Fraction arithmetic, decimal-to-fraction conversion, ratios and proportions.
Enter the values requested above and select Calculate. Change any input to compare another scenario. The calculation runs locally in your browser and does not require an account.
For 2/3 + 5/8, the common denominator is 24, so 16/24 + 15/24 = 31/24.
Add, subtract, multiply or divide two fractions and reduce the result to lowest terms. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
To calculate 3/4 − 1/6, use denominator 12: 9/12 − 2/12 = 7/12. The result is already in lowest terms. Change the operation to division to see why dividing fractions means multiplying by the reciprocal.
Watch for: a denominator of zero is not allowed, and dividing by a fraction with a zero numerator is also undefined. Negative signs can go in a numerator or denominator, but are usually written in the numerator.
Add, subtract, multiply or divide two fractions and reduce the result to lowest terms.
For addition and subtraction, use a common denominator. For multiplication, multiply numerators and denominators. For division, multiply by the reciprocal.
Yes. ERICH Calculators is free to use and does not require an account.
See how formulas, sources and limitations are handled across ERICH Calculators.