Question

Bill is in a class of 15 boys and 35 girls 40 percent of the students in the class take the bus to school how many students do not take the bus to school

Answer 1

the gender of the kids does not matter so it can be discarded.

you add up how many boys and girls in the class to make a total of 50 kids

your 100% is 50

meaning 40% of 50 is 20

so if 20 kids took the bus to school then 30 did not take the bus.