There are 84 people in grade 62 of 6 1 grade, and 58 people in grade 62 of 6 1 grade participate in social practice activities. Among them, Class One participated in 62.5% of the classes and Class Two participated in 75% of the classes. How many people are there in Class One and Class Two?

6 1 class (84-58÷75%)÷( 1-62.5%÷75%)

=(84-232/3)÷( 1-5/6)

=20/3÷ 1/6

=40 (person)

Level 62 84-40=44 (person)