What is 4/6 + 5/7 in simplest form?

Question: What is 4/6 + 5/7 in simplest form?

1. 59/42
2. 1/21
3. 29/21
4. 9/13

Correct Answer: C — 29/21

Explanation: Convert to a common denominator, add the numerators, and reduce.
Using the values in this question gives 29/21 as the correct answer.