Fraction Calculator On-device
Add, subtract, multiply and divide fractions.
First value
Second value
Result: 5/6
As a mixed number: 5/6
As a decimal: 0.833333
As a percentage: 83.3333%
Add, subtract, multiply and divide fractions and mixed numbers with automatic simplification, optional step-by-step working, and conversion between fractions, decimals and percentages. Runs entirely on your device.
About this tool
What you provide
- Two fractions or mixed numbers, each entered as whole, numerator and denominator.
- An operation: add, subtract, multiply or divide.
- Or a decimal, to convert into a fraction.
What you get
- The simplified result, also shown as a mixed number, a decimal and a percentage.
- Optional step-by-step working showing the common denominator and the simplification.
Limits
- Denominators may not exceed one million, because adding and subtracting cross-multiplies and larger values would lose precision.
- Converting a decimal gives the nearest simple fraction, so a repeating decimal is approximate.
- A zero denominator and division by zero are refused.
How to use it
Choose a tab
Use Calculate to work with two fractions, or Convert to turn a decimal into a fraction and a fraction into a decimal.
Enter the values
On Calculate, type each value as Whole, Numerator and Denominator and pick Add, Subtract, Multiply or Divide; on Convert, type the decimal or the three fraction fields instead.
Read the result
The simplified answer appears with its mixed number, decimal and percentage; tick Show steps for the common denominator and simplification, and use the Copy button under it.
Frequently asked questions
Can it handle mixed numbers?
Yes. You can enter a whole number with a fraction, and results are simplified automatically and shown as a mixed number where that reads more naturally.
Does it show the working?
Optional step-by-step working shows the common denominator and the simplification, so you can follow how the answer was reached.
Can I convert a fraction to a decimal or a percentage?
Yes. Each result is also shown as a decimal and a percentage, and you can convert in the other direction too.