Question

Maria’s current car gets 24 miles per gallon. Last year she drove 15,000 miles. Last year gas cost an average of $3.35

solve 1. How much did Maria spend for gas for her car last year?
solve 2. Maria is buying a new car that averages 32 miles per gallon. If she drives the car 15,000 miles in the next year and gas prices stay the same, how much will she spend for gas in the next year?
solve. 3 ) How much money will Maria save in gas costs in the next year by driving her new car as opposed to her old one?
solve 4. What percent decrease in gas costs for one year will Maria realize by driving her new car?

Answer 1

1) 2093.75

2) 1570.31

3) 523.44

4) 33.333%

Answer 2

1) Last year, Maria spent $2093.75. Here's the equation to find that answer:

(a ÷ b) × c

• a = 15,000
• b = 24
• c = 3.35

(15,000 ÷ 24) × 3.35

2) Same equation. (15,000 ÷ 32) × 3.35. The answer of this equation is 1570.3125, but that rounds to $1570.31.

3) This part represents a simple difference/subtraction problem. Since she spent $2093.75 last year, and will spend $1570.31 with a new car, she will save 523.44.

4) Using percent of change, the percent decrease Maria will realize in one year is 33.333%, or
`(1)/(3)`.

ANSWERS

1) 2093.75

2) 1570.31

3) 523.44

4) 33.333%