Question

A​ self-tanning lotion advertises that a 4 ​-oz bottle will provide seven applications. Jen found a great deal on a 13 ​-oz bottle of the​ self-tanning lotion she had been using. Based on the advertising​ claims, how many applications of the​ self-tanner should Jen​ expect?

Answer 1

4oz = 7 app
1oz = 1.75 app

13oz = 1.75 x 13
= 22.75 app

answer = the 13oz bottle should provide 22 application (as .75 does not count as one)