Question

A computer that cost 1099
last year costs 999
this year.
​
​What is the percent of change in price rounded to the nearest tenth?

Answer 1

To calculate the percent change in price, you can use the following formula:

\[
\text{Percent Change} = \frac{\text{New Price} - \text{Old Price}}{\text{Old Price}} \times 100
\]

In this case:

- Old Price = 1099
- New Price = 999

Substituting in the values:

\[
\text{Percent Change} = \frac{999 - 1099}{1099} \times 100
\]

Calculating the change in price:

\[
999 - 1099 = -100
\]

Now substituting that back into the formula:

\[
\text{Percent Change} = \frac{-100}{1099} \times 100
\]

Calculating the fraction:

\[
\frac{-100}{1099} \approx -0.0909
\]

Now multiply by 100 to get the percentage:

\[
-0.0909 \times 100 \approx -9.09
\]

Rounding to the nearest tenth gives:

\(-9.1\%\)

So, the percent change in price is approximately \(-9.1\%\).