Practical reference
Fraction Calculator
Combine two fractions and reduce the result to lowest terms with integer numerators and denominators.
Fraction rules
To add a/b and c/d, compute (ad+bc)/bd and reduce by the greatest common divisor. To multiply, use ac/bd. Never use a denominator of zero.
Three practical techniques
| Step | What to do |
|---|---|
| Input assumptions | Confirm the meaning of every value and whether it represents dollars, hours or a rate. |
| Test an edge case | Try zero interest where supported or a small easy-to-check example to verify the arithmetic. |
| Sanity check | Compare results with a manual calculation before using them for a financial decision. |
Limitations and transparency
This is an independent browser utility, not an official commercial service. Functionality depends on the browser and any public data provider listed in the tool. No AdSense advertising code is installed in this package. Results are never guaranteed to be complete or error-free.