Question

9. Sally fills her car with 12 gallons of gas. She goes on a journey and ends up with 7.5 gallons left in the tank. What is the percent of change? * pls HURRY

Answer 1

Given:

Sally fills her car with 12 gallons of gas.

She goes on a journey and ends up with 7.5 gallons left in the tank.

To find:

What is the percentage of change?

Solution:

The gallons of gas filled by Sally in her car = 12

The gallons of gas left in her car tank after the journey = 7.5

We know,

$\boxed{\bold{Percentage\:change = \frac{New\:number - Original \:number}{Original \:number}\times 100 }}$

Now,

The percentage change will be,

= $\frac{7.5 - 12}{12} \times 100$

= $\frac{ - 4.5}{12} \times 100$

= $- 0.375 \times 100$

= $\bold{- 37.5\%}$

Thus, Sally had finished the journey with 37.5% fewer gallons of gas in the tank than when she started her journey.

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