Math Solver / Fraction Calculator
Fraction Calculator
Add, subtract, multiply and divide fractions and get exact answers with every step.
Press Enter to solve · ^ for powers · sqrt() for roots · separate a system with a comma
Try:
The fraction calculator keeps answers exact. Type 3/4 + 5/6 and you get 19/12 (≈ 1.583333), not a rounded decimal. Longer expressions are evaluated in the correct order of operations, one step at a time.
How to use the fraction calculator
- Write fractions with a slash:
2/3. - Use + − * / and brackets:
(1/2 + 1/3) * 6/5. - Press Enter for the exact fraction, the decimal and the steps.
Fraction rules
| Operation | Rule |
|---|---|
| Add / subtract | Use a common denominator: a/b + c/d = (ad + bc)/bd |
| Multiply | Multiply across: a/b × c/d = ac/bd |
| Divide | Multiply by the reciprocal: a/b ÷ c/d = a/b × d/c |
| Simplify | Divide top and bottom by their greatest common factor |
Example: 3/4 + 5/6
- Least common denominator: 12.
- 3/4 = 9/12 and 5/6 = 10/12.
- 9/12 + 10/12 = 19/12 = 1 7/12.
Questions about fractions
How do I enter a mixed number?
Write it as a sum in brackets: 2 1/3 becomes (2 + 1/3).
Why is the answer an improper fraction?
Improper fractions such as 19/12 are standard in algebra. To convert, divide: 19 ÷ 12 = 1 remainder 7, so 19/12 = 1 7/12.
What order are operations done in?
Brackets, exponents, multiplication and division (left to right), then addition and subtraction — known as PEMDAS or BODMAS.