Answer: 60%
Explanation:
Sixth-graders that picked the museum = 39
Sixth-graders that picked the factory = 26
Total number of sixth graders = 39 + 26 = 65
Therefore, the percentage of the sixth-graders that picked the museum would be:
= Sixth-graders that picked the museum / Total number of sixth graders × 100
= 39/65 × 100
= 60%