Adding and Subtracting Fractions - Review

The least common denominator (LCD) is the smallest number that can be used as a common denominator for two or more fractions.

To add fractions with different denominators, first find the least common denominator (LCD), convert each fraction to an equivalent fraction with the LCD, then add the numerators.

To subtract fractions with different denominators, find the least common denominator (LCD), convert each fraction to an equivalent fraction with the LCD, then subtract the numerators.

An equivalent fraction is a fraction that represents the same value as another fraction, even though the numerator and denominator may be different.

To simplify a fraction, divide both the numerator and the denominator by their greatest common factor (GCF).

To convert an improper fraction to a mixed number, divide the numerator by the denominator. The quotient is the whole number, and the remainder is the new numerator.