Fraction calculator — add, subtract, multiply, divide
Add, subtract, multiply or divide two fractions and read the simplified result, with a decimal and a mixed number where applicable.
Runs in your browser — your input is not uploaded to ToolsNow.
Decimal to fraction
Fractions are simplified to their lowest terms. The decimal may be rounded, and very large inputs can exceed the precision available in the browser.
How to use
- Enter the two fractions. Put whole-number numerators above the line and non-zero denominators below it.
- Choose an operation. For example, 1/2 + 1/3 gives 5/6, with the decimal rounded for display.
- Convert a decimal if needed. The separate panel turns 0.375 into 3/8. Some decimals return a nearby fraction rather than an exact equivalent.
Questions
How do I add fractions with different denominators?
Write them over a common denominator first. For 1/2 + 1/3, use 3/6 + 2/6 = 5/6. The tool simplifies the result by dividing numerator and denominator by their greatest common divisor.
How does division work?
Flip the second fraction and multiply: 1/2 ÷ 1/4 becomes 1/2 × 4/1 = 2. A denominator cannot be zero, and you cannot divide by a fraction whose numerator is zero.
Why can 0.333333 return 1/3?
The decimal converter searches for a fraction close to the entered value. Here it returns 1/3, but 0.333333 is a finite decimal, so the two are not exactly equal. Enter 333333/1000000 in the fraction fields if those exact digits matter.
What is a mixed number?
It combines a whole number with the remaining fraction. For example, 3/2 + 1/1 gives 5/2, shown as 2 1/2. A result that is already a whole number has no mixed-number row value.
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