Respuesta :

the common denominator is 20

Answer:

LCD (3 /5 , 3/ 4 ) = LCM(5, 4) = 2²×5 = 20

Step-by-step explanation:

The lowest common denominator or least common denominator (abbreviated LCD) is the least common multiple of the denominators of a set of fractions. It is the smallest positive integer that is a multiple of each denominator in the set.