Fraction Calculator
Add, subtract, multiply and divide fractions. Answer is simplified.
What is a fraction calculator?
A fraction calculator adds, subtracts, multiplies and divides fractions for you and simplifies the answer. Instead of finding a common denominator by hand, you enter the two fractions, choose the operation, and get the result as a simplified fraction and a decimal.
How to use the fraction calculator
Enter the numerator and denominator of the first fraction, pick an operation (+, −, × or ÷), then enter the second fraction and click Calculate. The calculator shows the simplified answer and the working steps.
Formula
To add fractions: a/b + c/d = (a×d + c×b) / (b×d). The result is then simplified by dividing the numerator and denominator by their greatest common divisor.
Example
3/8 + 5/12 = (3×12 + 5×8) / (8×12) = 76/96 = 19/24, which is about 0.7917.
Frequently Asked Questions
What is 3/8 + 5/12?
3/8 + 5/12 = 19/24, which is about 0.7917. Try it on the calculator above.
How do you add fractions with different denominators?
Convert both fractions to the same denominator, add the numerators, then simplify. For example, 3/8 + 5/12 becomes 9/24 + 10/24 = 19/24.
Does this calculator simplify fractions?
Yes. Every answer is automatically simplified by dividing the numerator and denominator by their greatest common divisor.
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