Question

Rob is saving to buy a new MP3 player. For every $12 he earns babysitting, he saves $9. On Saturday, Rob earned $36 babysitting. How much money did he save?

Answer 1

Answer:

$27

Step-by-step explanation:

Set up a proportion where x is the amount of money he saved:

$\frac{12}{9}$ = $\frac{36}{x}$

Cross multiply and solve for x:

12x = 324

x = 27

So, he saved $27