Find the least common multiple of the two denominators. When applied to fractions this number is called the least common denominator (LCD). ...Convert each fraction to an equivalent fraction that has the LCD as its denominator. ...Add the numerators and place over the common denominator.
Find the LCM of the two denominators. When you applied to fractions this number, Convert each fraction to an equivalent fraction that has the LCD as its denominator then add the numerators and place over the common denominator.
