Do arithmetic with fractions without the mental gymnastics. Enter two fractions as numerator and denominator pairs, choose whether to add, subtract, multiply or divide, and the calculator returns the exact result reduced to its lowest terms, along with the equivalent decimal value. It finds a common denominator where needed and simplifies using the greatest common divisor, so the answer is always in its cleanest form. This is useful for cooking measurements, woodworking, schoolwork and any situation where fractions are more natural than decimals. It handles negative fractions and guards against dividing by zero. Enter your numbers, pick an operation, and the exact fraction plus decimal appears instantly, all computed locally in your browser with nothing sent anywhere.