A computer that cost 1099

last year costs 999
this year.

​What is the percent of change in price rounded to the nearest tenth?

1 answer

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 \(-9.1%\).