Add, subtract, multiply, or divide two fractions, automatically simplified — free and instant.
Enter two fractions and an operation, and this computes the result already simplified to its lowest terms — for example, 2/4 + 1/4 gives 3/4, not 6/8, since the simplification is applied automatically rather than left for you to do by hand.
Addition and subtraction use a common denominator (the product of both denominators, then simplified back down); multiplication multiplies numerators and denominators directly; division multiplies by the second fraction's reciprocal. The result is also shown as a decimal alongside the simplified fraction, since both forms are useful depending on what you need it for.
Yes — enter a negative sign on the numerator (or denominator), and the result’s sign is handled correctly.
That’s undefined in mathematics — this tool will tell you directly rather than show a nonsensical result.
Not directly — convert a mixed number to an improper fraction first (1½ becomes 3/2) and enter that.