Fraction Calculator
Free fraction calculator. Add, subtract, multiply and divide two fractions and get the answer simplified to lowest terms, as a decimal and as a mixed number.
Fractions
First Fraction
Second Fraction
Simplified Result
5/6
Details
How It Works
Enter the first fraction
Type the numerator (top) and denominator (bottom) of your first fraction.
Choose an operation
Pick add, subtract, multiply or divide, then enter the second fraction.
Read the simplified answer
The result appears instantly, reduced to lowest terms, along with its decimal value and mixed-number form.
A fraction represents a part of a whole, written as a numerator over a denominator. Arithmetic with fractions follows fixed rules: addition and subtraction require a common denominator, while multiplication and division work directly on the numerators and denominators. Keeping track of signs and reducing to lowest terms is where most mistakes happen by hand.
This calculator performs all four operations on two fractions and always returns an exact answer — no rounding — reduced to its simplest form using the greatest common divisor. It also gives you the decimal equivalent and, where applicable, the mixed-number form, so you can read the result in whichever way is most useful.
Frequently Asked Questions
How do you add or subtract fractions?
Give both fractions a common denominator, then add or subtract the numerators. This calculator uses the cross-multiplication form: a/b ± c/d = (a·d ± c·b) / (b·d), then reduces the answer to lowest terms.
How do you multiply and divide fractions?
To multiply, multiply the numerators together and the denominators together: a/b × c/d = (a·c)/(b·d). To divide, multiply by the reciprocal of the second fraction: a/b ÷ c/d = (a·d)/(b·c). The result is then simplified.
What does it mean to simplify a fraction?
Simplifying means dividing the numerator and denominator by their greatest common divisor so the fraction is written in its smallest equivalent form. For example, 6/8 simplifies to 3/4.
What is a mixed number?
A mixed number combines a whole number with a proper fraction, such as 1 1/2. When the result is an improper fraction (numerator larger than the denominator), this calculator also shows it as a mixed number.
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