If you feel better at school, then you will eat breakfast.
To find out the amount Jenna earns, you need to multiply how much she earns per hour by the amount of hours she works for.
If she earns $8.75 for 1 hour, and works for 20 1/5 hours, she'll earn:
8.75 x 20 1/5 = 176.75
Jenna earns $176.75 before tax.
If they can be multiplied or divided by the same number and they both have the same answer it is equivelent.