How do I add or subtract fractions?
Put them over a common denominator first, then add or subtract the numerators. 1/2 + 1/3 becomes 3/6 + 2/6 = 5/6.
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Fraction calculator
Add, subtract, multiply or divide two fractions and reduce to lowest terms.
a/b op c/d → simplest form
Frequently asked questions
How do I multiply and divide fractions?
To multiply, multiply the tops together and the bottoms together. To divide, flip the second fraction and multiply: 2/3 ÷ 3/4 = 2/3 × 4/3 = 8/9.
What does 'simplest form' mean?
A fraction is in simplest form when the top and bottom share no common factor other than 1. 4/6 simplifies to 2/3 by dividing both by 2.
Where is this used in real life?
Cooking — halving a recipe that needs 3/4 cup means 3/4 × 1/2 = 3/8 cup. Carpentry and sewing — adding 1/2 inch and 3/8 inch of material is 7/8 inch. Time — 1/4 of an hour is 15 minutes. Fractions describe any part of a whole that isn't a round number.
What does the pie show?
It shows the fractional (less-than-one) part of the answer as a shaded slice, so you can picture how close the result is to a whole.