Fraction Calculator: Add, Subtract, Multiply and Divide Fractions
Enter two fractions and choose an operation. The calculator returns the answer in its simplest form, as a mixed number, as a decimal and as a percentage.
Estimates only. Check important results before you rely on them.
More Math calculators
View all 10You may also need
From related categoriesHow to use this calculator
- Type the numerator and denominator of the first fraction.
- Pick +, −, × or ÷.
- Type the second fraction.
- Read the simplified answer, the mixed number and the decimal.
The formula
Worked example
3/4 + 5/6 = (3×6 + 5×4) ÷ (4×6) = 38/24. The GCD of 38 and 24 is 2, so the simplified answer is 19/12, which is 1 7/12 or about 1.5833.
Understanding your result
The line "Before simplifying" shows the raw result so you can follow the working. A negative answer keeps the minus sign on the top. Dividing by a fraction whose top is zero is not possible.
When to use it
- Check homework on fractions.
- Scale recipes and measurements.
- Combine parts in woodwork, sewing and construction.
Assumptions and limits
Use whole numbers for the top and bottom. Denominators cannot be zero. To use a mixed number, convert it first: 2 1/3 is 7/3.
Frequently asked questions
How do I add fractions with different denominators?
Cross-multiply to a common denominator: a/b + c/d = (ad + bc) ÷ bd. Then simplify.
How do I divide one fraction by another?
Multiply the first fraction by the reciprocal of the second. 3/4 ÷ 3/8 = 3/4 × 8/3 = 2.
What is a simplified fraction?
A fraction whose top and bottom share no common factor other than 1. 38/24 simplifies to 19/12.
What is a mixed number?
A whole number plus a proper fraction. 19/12 is the same as 1 7/12.
Can I enter a decimal in a fraction?
Use whole numbers here. To use 0.5, enter 1 and 2, or multiply the top and bottom by 10 first.