How to work with fractions
Example: 1/2 + 1/3: the lowest common denominator is 6, so 1/2 = 3/6 and 1/3 = 2/6, and 3/6 + 2/6 = 5/6, or 0.8333 as a decimal.
Mixed numbers such as 1 1/2 become improper fractions first: 1 × 2 + 1 = 3, so 1 1/2 = 3/2. Type them with a space between the whole number and the fraction.
Simplifying
A fraction is simplest when the top and bottom share no common factor except 1. Divide both by their greatest common divisor: 12/18 has a GCD of 6, so it simplifies to 2/3. The calculator always simplifies the answer and shows the improper fraction, the mixed number and the decimal.
Next steps
To turn a fraction into a percent, multiply the decimal by 100, or use the percentage calculator.
Frequently asked questions
How do I add fractions with different denominators?
Rewrite them with a common denominator, then add the tops. 1/4 + 1/6: the lowest common denominator is 12, so 3/12 + 2/12 = 5/12.
How do I divide fractions?
Flip the second fraction and multiply. 3/4 ÷ 1/2 = 3/4 × 2/1 = 6/4 = 1 1/2.
How do I convert a fraction to a decimal?
Divide the top by the bottom. 5/8 = 5 ÷ 8 = 0.625.
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