A fraction represents a part of a whole, consisting of a numerator (top) and denominator (bottom). The denominator shows how many equal parts the whole is divided into; the numerator shows how many parts are being considered.
Find the least common multiple of the denominators, convert each fraction, then add or subtract the numerators. Simplify the result by dividing by the greatest common divisor.
To multiply, multiply numerators together and denominators together. To divide, flip the second fraction and multiply. Always simplify the final result.
A mixed number (2¾) and improper fraction (11/4) represent the same value. To convert, multiply the whole number by the denominator and add the numerator.