How to use the fraction calculator
- First numerator: The top integer in the first fraction.
- First denominator: The bottom nonzero integer in the first fraction.
- Operation: Choose how to combine the fractions.
- Second numerator: The top integer in the second fraction.
- Second denominator: The bottom positive integer in the second fraction.
- Select Calculate to see the result. Change any input and calculate again to compare.
Worked example
One half plus one quarter equals three quarters, or 0.75.
Formula and assumptions
1/2 + 1/4 = 3/4.
Integer inputs only. Division by a zero fraction is not defined.
Common questions
Why might my result differ from another estimate?
Integer inputs only. Division by a zero fraction is not defined. Keep the same inputs and rounding when comparing tools.
Are my entries saved?
No. Calculations run on your device. Reloading or closing this page may clear your entries.