➗ Fraction Calculator
Add, subtract, multiply, and divide fractions and mixed numbers — with simplified answers and steps.
Leave "whole" empty for simple fractions. For a negative mixed number, put the minus sign on the whole number.
How the Fraction Calculator Works
Enter two fractions — each can be a simple fraction (3/4), an improper fraction (7/4), or a mixed number (1 3/4) — and choose an operation. The calculator converts mixed numbers to improper fractions, performs the operation, and reduces the result to lowest terms by dividing the numerator and denominator by their greatest common factor (GCF).
You get the answer as a simplified fraction, as a mixed number, and as a decimal, along with the working so you can follow each step — useful for checking homework.
Formula
a/b + c/d = (a·d + c·b) / (b·d) a/b − c/d = (a·d − c·b) / (b·d) a/b × c/d = (a·c) / (b·d) a/b ÷ c/d = (a·d) / (b·c) Simplify: divide numerator and denominator by GCF(numerator, denominator) Mixed number w n/d = (w·d + n) / d
How to Use It
- Enter the first fraction (use the whole-number box only for mixed numbers).
- Choose add, subtract, multiply, or divide.
- Enter the second fraction.
- Read the simplified result, the mixed-number form, the decimal, and the steps.
Frequently Asked Questions
How do you add fractions with different denominators?
Rewrite both fractions with a common denominator, add the numerators, and simplify. For example, 1/3 + 1/4 = 4/12 + 3/12 = 7/12. This calculator does the cross-multiplication and simplification automatically.
How do you divide fractions?
Multiply the first fraction by the reciprocal (flipped version) of the second: a/b ÷ c/d = a/b × d/c. For example, 3/4 ÷ 1/2 = 3/4 × 2/1 = 6/4 = 3/2 = 1 1/2.
How do you simplify a fraction?
Divide the numerator and the denominator by their greatest common factor. For 18/24 the GCF is 6, so 18/24 = 3/4.
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Formula and content last reviewed: September 2026. All calculations run in your browser — nothing you enter is sent to or stored on our servers.
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See all →✔ Reviewed by GelirLab Editöryal Ekibi · Last reviewed: September 2026 · How we check our calculators