AllEasyToolsLower secondary
Add fractions
Add fractions: formula, units and explained result. No account required. Processing stays in your browser.
a/b + c/d = (ad + bc)/(bd)
Integers up to one million; nonzero denominators. Simplified result.
How to use this calculator
- Identify the quantities and convert them to the units shown.
- Apply the formula first, then compare with the substitution and result.
- Check the assumptions and whether the order of magnitude makes sense.
Levels are approximate topic groupings, not a complete curriculum for every country. Numerical results are rounded and may lose precision for extreme or nearly singular inputs.
A practical example
Use these sample inputs to check the calculation before entering your own values.
- Numerator a
- 1
- Denominator b
- 2
- Numerator c
- 1
- Denominator d
- 3
Result for this example
- Simplified fraction
- 5/6
- Decimal
- 0.8333333333333334