General
Fraction Calculator
Add, subtract, multiply, and divide fractions. Simplify results, convert to decimals and percentages — all with step-by-step working using the LCD method.
Fraction A
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Fraction B
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Fraction to simplify
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Fraction to convert
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Fraction A
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Fraction B
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Enter fractions and click Calculate
How is this calculated?
Addition: a/b + c/d = (ad + bc) / bd (then simplify)
Subtraction: a/b − c/d = (ad − bc) / bd (then simplify)
Multiply: a/b × c/d = ac / bd
Division: a/b ÷ c/d = ad / bc
Simplify: divide both by GCD(numerator, denominator)
LCD Method: find LCM of denominators, scale numerators accordinglyFAQ
Frequently asked questions about fractions
How do I add fractions with different denominators?
First, find a common denominator. Then convert the numerators accordingly and add them together.
How do I multiply two fractions?
Multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator.
What is a simplified fraction?
A fraction is simplified when the numerator and denominator share no common factors other than 1.
How do I convert a mixed number to an improper fraction?
Multiply the whole number by the denominator, add the numerator, and place that result over the original denominator.
How does dividing fractions work?
To divide fractions, multiply the first fraction by the reciprocal (flipped version) of the second fraction.