Add two fractions with any denominators. Enter the numerators and denominators for each fraction and this calculator finds the common denominator, adds the fractions, and simplifies the result. Step-by-step working is shown so you can see exactly how the answer was reached. All calculations run locally in your browser.
For addition and subtraction, the tool finds the least common multiple (LCM) of the two denominators, converts both fractions, and adds or subtracts the numerators. For multiplication, numerators and denominators are multiplied directly. For division, the second fraction is flipped (reciprocal) and multiplied. Results are simplified using the greatest common divisor (GCD) via the Euclidean algorithm. All arithmetic runs in JavaScript in your browser.
All calculations happen locally in your browser tab. Our servers are not involved at any point.
For converting a fraction into a percentage, try the percentage calculator. To switch between metric and imperial measures, use the unit converter. For translating numbers into Roman numerals, see the Roman numeral converter.