Fraction Calculator
Add, subtract, multiply, and divide fractions with simplified results.
= 1 1⁄4
= 1.25
How fraction arithmetic works
To add or subtract, rewrite both fractions over a common denominator, then combine the numerators: 1/2 + 3/4 = 2/4 + 3/4 = 5/4. To multiply, multiply straight across: numerator × numerator over denominator × denominator. To divide, flip the second fraction and multiply — dividing by 3/4 is the same as multiplying by 4/3.
Simplifying
A fraction is simplified by dividing top and bottom by their greatest common divisor. The calculator always reduces the result and, when it's top-heavy, also shows the mixed-number form (5/4 = 1 ¼) and its decimal value.
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