What is Fraction Calculator?
Fraction Calculator helps you add, subtract, multiply or divide fractions and simplify the result.
The main result is simplified fraction, with a breakdown of decimal value. The formula, example and assumptions below explain how to interpret it.
How to use Fraction Calculator
Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.
- Gather first numerator, first denominator, operation, second numerator and second denominator. Use values from the same situation or reporting period.
- Replace the example first numerator with your own value, then complete the other fields. Check the displayed units and each selected option.
- Select Calculate and read simplified fraction with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
- Enter first numerator, at least -1000000. Use a whole number.
- Enter first denominator, at least -1000000. Use a whole number.
- Choose operation from Add, Subtract, Multiply and Divide.
- Enter second numerator, at least -1000000. Use a whole number.
- Enter second denominator, at least -1000000. Use a whole number.
Fraction Calculator: a worked example
With the inputs below, the result is 5/6 (simplified fraction). Follow the example, then replace these illustrative values with your own.
| Input or output | Example value |
|---|---|
| First numerator | 1 |
| First denominator | 2 |
| Operation | Add |
| Second numerator | 1 |
| Second denominator | 3 |
| Simplified fraction | 5/6 |
| Decimal value | 0.833333 |
Understanding the Fraction result
Read simplified fraction alongside decimal value. These describe different parts of the same calculation.
Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.
- Example Decimal value: 0.833333
Fraction Calculator: assumptions and common mistakes
A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.
- Check the base value, sample definition and chosen operation. Display rounding should come after the calculation.
For wider guidance, visit NIST statistical handbook. The formula and scope of this specific tool are stated on this page.
