Fraction calculator
Work out fraction sums exactly, and see every step from common denominator to lowest terms.
- 100% free
- No sign-up
- Runs in your browser
How to use Fraction calculator
- Enter two fractions
- Read the answer
- Follow the working
Your sum
Operation
Result
Enter two fractions to see the answer and the working.
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How to use Fraction calculator
Enter two fractions
Type fractions like 3/4, mixed numbers like 1 2/3, whole numbers or decimals, and pick +, −, × or ÷.
Read the answer
See the result in lowest terms, as a mixed number and as a decimal, with any repeating digits marked.
Follow the working
The steps show the common denominator, the new numerators and the GCD used to simplify, ready to copy into homework.
Why use Utils365
Exact answers
Fractions are worked out with whole numbers of any size, so 1/3 + 1/6 is exactly 1/2, never 0.4999.
Shows the method
Each step is written out in plain words, the same way it is taught at school.
Three tools in one
Do sums with two fractions, simplify a single fraction, or turn a decimal such as 0.375 or 0.1(6) into a fraction.
Mixed numbers welcome
Type 2 1/4 as it is written. Answers are given as both an improper fraction and a mixed number.
Frequently asked questions
How do you add fractions with different denominators?
Find the lowest common denominator, rewrite both fractions over it, then add the numerators. For 1/6 + 1/4 the common denominator is 12, so it is 2/12 + 3/12 = 5/12.
How do you multiply fractions?
Multiply the numerators together and the denominators together, then simplify. 2/3 × 3/4 = 6/12, which simplifies to 1/2.
How do you divide fractions?
Flip the second fraction and multiply. 1/2 ÷ 1/4 becomes 1/2 × 4/1 = 4/2 = 2.
How do I simplify a fraction?
Divide the top and bottom by their greatest common divisor (GCD). For 42/56 the GCD is 14, so it simplifies to 3/4.
How do I turn a decimal into a fraction?
Write the digits over a power of 10 and simplify. 0.375 is 375/1000, and dividing both by 125 gives 3/8.
How do I enter a repeating decimal?
Put the repeating digits in brackets. 0.(3) means 0.333… and gives 1/3, and 0.1(6) means 0.1666… and gives 1/6.
How do I type a mixed number?
Leave a space between the whole number and the fraction, such as 1 2/3. For a negative mixed number put the minus first: −1 2/3.