About this fraction calculator
Fractions follow a few simple rules. To add or subtract them, rewrite both over a common denominator, here the least common multiple of the two denominators, then add or subtract the numerators. To multiply, multiply the numerators together and the denominators together. To divide, flip the second fraction and multiply. Mixed numbers such as 2 1/2 are first turned into improper fractions, like 5/2. The calculator works with exact whole numbers rather than rounded decimals, simplifies the answer by the greatest common factor, and shows repeating decimals such as 0.41(6) exactly.
How to use the fraction calculator
- Enter the first fraction. Type the numerator on top and the denominator below. For a mixed number, also fill in the whole-number box on the left.
- Choose the operation and the second fraction. Pick +, −, ×, or ÷ and enter the second fraction the same way, or press an example.
- Press Calculate. Read the simplified answer, mixed number, decimal, and percent, and follow the steps to see how it was worked out.
Frequently asked questions
How do I add fractions with different denominators?
Find a common denominator, convert each fraction, then add the numerators. For 1/2 + 1/3, the common denominator is 6, so 3/6 + 2/6 = 5/6.
How do I divide fractions?
Keep the first fraction, flip the second, and multiply. 5/6 ÷ 2/3 becomes 5/6 × 3/2 = 15/12, which simplifies to 5/4 or 1 1/4.
How do I enter a negative fraction?
Put a minus sign in front of the numerator, such as -3 over 4, or in front of the whole number for a mixed number, such as -2 and 1/2 for −2 1/2.
How do I enter a whole number?
Type it in the whole-number box and leave the numerator and denominator empty, or enter it as a numerator over 1. For example, 3 is the same as 3/1.
What does a decimal like 0.41(6) mean?
The digits in brackets repeat forever, so 0.41(6) means 0.416666… Showing the repeating part keeps the decimal exact instead of rounding it.