Method
Addition and subtraction use ad ± bc over bd; multiplication uses ac over bd; division multiplies by the reciprocal. The final numerator and denominator are divided by their GCF.
Math worksheet
Fraction Calculator
Add, subtract, multiply or divide two fractions and see the common-denominator work, reduced answer, mixed number and decimal.
The calculation runs locally. Exact-integer tools avoid floating point; decimal and transcendental tools report rounding limits.
Method and verification guide
How the Fraction Calculator works
Addition and subtraction use ad ± bc over bd; multiplication uses ac over bd; division multiplies by the reciprocal. The final numerator and denominator are divided by their GCF. The calculator keeps the intermediate values visible so you can reproduce the answer independently.
Interpret the result
Equivalent improper, mixed-number and decimal forms describe the same rational value.
Check the assumptions
Inputs must be integers and denominators cannot be zero.
Local calculation
Everything runs in this browser. Inputs are not sent to an external calculator.
Rounding
Displayed values may be rounded for readability while calculations use full floating-point precision unless the tool explicitly uses exact integers.
Scope
Inputs must be integers and denominators cannot be zero.
Simple by design
Three steps to a clearer number.
Enter your details
Use realistic values in each field. You can change them anytime.
Calculate instantly
The formula runs locally, so there is no account or waiting time.
Use the result
Treat the answer as a practical estimate for your next decision.