Please help

Question

Mr. Chavez owned 3/4 of a family business. He sold 1/2 of the business to his sister. what portion of the business does he still own?
a. 5/4
b. 1/4
c. 1/5
d. 4/5
Answer: b

Gasoline is about $2 per gallon. You use about 1 1/2 each day driving to and from work. how much budget for gasoline over the next month (about 20 workdays).
a. $40
b. $50
c. $60
d. $70
Answer: c

Answer 1

1. its a basic subtraction question.
(3/4)-(1/2)=1/4 you subtract because he sold it.

Answer 2

2. since you want to know for 20 days, how much gas you waste,
20*( 1 1/2) = 30
So , you waste 30 gallons of gas in 20 days, How much money do you spend on 30 gallons of gas.

30*($2)= $60 for 30 gallons of gas which covers 20 workdays)