Question

Find the least common denominator than find the sum. 2/3 + 1/7

A: 2/7+1/7 = 3/7
B: 2/21+3/21 = 5/21
C: 2/3+1/7 = 3/10
D: 14/21+3/21 = 17/21

Answer 1

[AI-generated answer — Bot GPT 3.5]

The least common denominator (LCD) of 3 and 7 is 21. Thus, the sum of 2/3 and 1/7 with the common denominator of 21 is 2/21 + 3/21 = 5/21. Therefore, the correct option is B: 2/21+3/21 = 5/21.