Question

A woman traded in her old​ car, which got 40 miles per gallon on the​ highway, and purchased a new​ car, which gets 38 miles per gallon. What is the percent of decrease in​ mileage?

Answer 1

when the woman trade in 40 miles to the gallon and got a car for 38 the percent of decrease in mileage is 2% in mileage.

Answer 2

The percent of decrease in​ mileage will be $5\%$.

What is percentage?

Percentage is  a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%".

We have,

Mileage of old​ car $=40$ miles per gallon

And,

Mileage of new​ car $=38$ miles per gallon

So,

Change in mileage $=40-38=2$ miles per gallon

Now,

Percent Change in mileage $=\frac{2}{40} *100$

Percent Change in mileage $=5\%$

i.e.

Percent decrease in mileage $=5\%$

Hence we can say that the percent of decrease in​ mileage will be $5\%$.

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