Add, subtract, multiply or divide two fractions, including negative values and mixed-number results.
Calculate the complete standard result without signing in.
Required fields start blank. Try sample to see a worked example.
Start with the result. Open the details only when you need them.
Enter your numbers and calculate to see the result.
MPPM will explain what the result means and what to check next.
MPPM helps connect practical calculations with clearer personal and business decisions.
Free gives you the standard answer. Pro helps you plan targets, compare scenarios, organise recurring work and create decision-ready outputs.
Compare current, conservative and growth cases before committing to a change.
Test the same assumptions across multiple scenarios and see how the result moves.
Turn the calculation into a clear next-step recommendation.
MPPM connects the result and supporting metrics into one practical decision summary.
Start from the outcome you want, not only the result you have.
Work backwards from a target to the performance, volume or budget required.
Move from calculator result to something you can actually share.
Create structured outputs for managers, clients and recurring reviews.
Reuse important assumptions across connected decisions.
Connect this result with the other calculators in the MPPM workflow.
See how the decision changes over time.
Keep previous calculations, revisit assumptions and compare performance without deleting old work.
Denominators must not be zero. Division by a zero fraction is undefined.
Denominators cannot be zero.
Choose add, subtract, multiply or divide.
Reduce the final numerator and denominator using their greatest common divisor.
1/2 + 1/3 = 5/6.
Use connected calculators when the next question depends on another part of the economics.
Find a common denominator, add the adjusted numerators and reduce the result.
Multiply the first fraction by the reciprocal of the second fraction, provided the second numerator is not zero.
Yes. Negative numerators and denominators are normalized to a single sign in the result.
