Question

How many sixth graders were surveyed?

Answer 1

5% of the whole comes out to 30. Then 0.05n = 30, and n = 30 / 0.05, or
n = 600

600 sixth graders were surveyed.

5% of them, or 0.05(600), or 30, own birds.

Answer 2

600
30 is .05 of 100
30/.05=600