CPM Homework Help : CC2 Problem 8-17

If five songs can be downloaded for $\$6$ , what is the cost of seven songs?

Hint:

How is the cost related to the number of songs?

Step 1:

Set up a proportion relating the cost of the songs to the number of songs.

$\frac{5}{6}=\frac{7}{\textit{x}}$

Step 2:

Cross multiply and divide to find the unknown value.

Answer:

$\$8.40$