Answer:
24 piano lessons
Explanation:
$0.18: One time
$4.32: ? times
You have to divide 4.32 by 0.18 which will give you 24. So Jennifer practiced 24 times. :)
I hope that helps! :D
P.S. I don't know how you're supposed to do it (i.e. proportions, ratios, etc.), so that's why I did it the way I learned. I just want to say: there are more ways to do this problem. :)