Question

Find the Least Common Denominator then find the Sum.
2/3 + 1/7

1. 2/7 + 1/7 = 3/7
2. 2/21 + 3/21 = 5/21
3. 2/3 + 1/7 = 3/10
4. 14/21 + 3/21 = 17/21

Answer 1

The least common denominator between 3 and 7 is 21.

Therefore,

2/3 + 1/7 = (2 * 7)/(3 * 7) + (1 * 3)/(7 * 3)
= 14/21 + 3/21
= 17/21

So, the sum is 17/21.