Add, subtract, multiply or divide two fractions, with the result simplified for you.
5/6
As a mixed number
—
As a decimal
0.83
Adding and subtracting fractions requires a common denominator—the step where most errors happen. This calculator handles the heavy lifting: it finds the common denominator by cross-multiplying numerators and denominators, performs your operation, then simplifies the result by dividing both the numerator and denominator by their greatest common divisor (GCD). For division, the calculator applies the reciprocal rule (multiply by the flipped second fraction), which turns a tricky operation into simple multiplication. Mixed numbers are displayed for improper fractions—fractions where the numerator is larger than the denominator.
Add 1/2 + 1/3 by finding a common denominator: (1×3 + 1×2) ÷ (2×3) = 5/6, which equals approximately 0.8333 as a decimal.
Divide 7/8 ÷ 1/2 using the reciprocal rule: 7/8 × 2/1 = 14/8, which simplifies to 7/4, displayed as the mixed number 1 3/4.
How do I add fractions with different denominators?
Multiply the first fraction's numerator by the second fraction's denominator, then multiply the second fraction's numerator by the first fraction's denominator. Add these two products to get the new numerator. Multiply the denominators to get the new denominator. For example, 1/2 + 1/3 = (1×3 + 1×2) ÷ (2×3) = 5/6.
How do I divide fractions?
Flip the second fraction upside down (take its reciprocal) and multiply. For example, 7/8 ÷ 1/2 becomes 7/8 × 2/1 = 14/8, which simplifies to 7/4.
What is an improper fraction vs a mixed number?
An improper fraction has a numerator equal to or greater than its denominator, like 7/4. A mixed number combines a whole number and a fraction, like 1 3/4, representing the same value. Both are equivalent; mixed numbers are often easier to visualize.