Question
What is the least common denominator of the fractions (4)/(15),(1)/(20) , and (3)/(8)
Solution
4.2
(203 Votos)
Andrés
Elite · Tutor por 8 anos
Resposta
To find the least common denominator (LCD) of the fractions
,
, and
, we need to find the least common multiple (LCM) of their denominators: 15, 20, and 8.First, let's find the prime factorization of each number:- 15 = 3 × 5- 20 = 2^2 × 5- 8 = 2^3Next, we find the LCM by taking the highest power of each prime factor that appears in the factorizations:- The highest power of 2 is 2^3.- The highest power of 3 is 3.- The highest power of 5 is 5.Therefore, the LCM of 15, 20, and 8 is:
So, the least common denominator of the fractions
,
, and
is
.