Fraction Calculator
Work with fractions and mixed numbers. Choose an operation to get the simplified answer as a fraction, mixed number and decimal, with the steps shown, or simplify and convert fractions.
Leave the whole-number box empty for a simple fraction. Negative numbers are allowed.
Answer
Decimal to fraction
As a fraction
How to use the fraction calculator
- Enter the first fraction (add a whole number for a mixed number).
- Choose +, −, × or ÷ and enter the second fraction.
- Read the simplified answer and the steps. Below, convert any decimal to a fraction.
How fraction arithmetic works
To add or subtract, rewrite both fractions with a common denominator (the least common multiple of the denominators), then add or subtract the numerators: 3/4 + 2/3 = 9/12 + 8/12 = 17/12 = 1 5/12.
To multiply, multiply the numerators and the denominators. To divide, multiply by the reciprocal of the second fraction: 3/4 ÷ 2/3 = 3/4 × 3/2 = 9/8. Mixed numbers are converted to improper fractions first.
Answers are simplified by dividing the numerator and denominator by their greatest common divisor. The decimal converter finds the exact fraction for terminating decimals and the closest simple fraction for repeating ones like 0.333….
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Frequently asked questions
How do I add fractions with different denominators?
Find a common denominator, convert each fraction, then add the numerators.
How do I divide fractions?
Keep the first fraction, flip the second, and multiply.
How do I enter a mixed number?
Type the whole number in the left box and the fraction in the stacked boxes.
What is 0.375 as a fraction?
3/8.