Chapter 6.4, Problem 3GP

To determine

To find: Percent of change.

Answer to Problem 3GP

Percent of change is $30.8\%$

Percent of change is decrease.

Explanation of Solution

Given information:

Amount Smoothie made of Saturday = Original amount $=\$1300$

Amount Smoothie made of Saturday = Final amount $=\$900$ .

Percent of change $=\frac{A}{O}\times 100$

Where

  $A=$ Amount of change.

  $O=$ Original amount.

From given information

Original amount $=\$1300$ .

Final amount $=\$900$

Amount of change = Final amount $-$ Original amount

  $\begin{array}{l}\Rightarrow A=900-1300\\ \Rightarrow A=-400\end{array}$

Therefore,

Percent of change $=\frac{-400}{1300}\times 100$

  $\Rightarrow$ Percent of change $=\frac{-40000}{1300}$

  $\Rightarrow$ Percent of change $=-30.7692$

To the nearest tenth, the Percent of change is $30.8\%$ and negative sign indicates that percent of decrease.