At East Middle School, 25% of the 60 students Mrs. White teaches buy their lunches in the cafeteria. How many students purchase their lunch in the cafeteria?

15

Step-by-step explanation:

Whenever you see 25% of something, divide the original number by four. Because 25x4=100, you can use this equation. 25% of something is always your original number divided by four. In this case, the original number is 60. 60 divided by four is 15.

$175

Step-by-step explanation:

susan babysit for 2×4+6=14 hours a week

so she works 14×5=70 hours in 5 weeks

in a hour she earn $2.50

in 70 hours she earn 2.50×70=$175