What is the question you are looking for?
1. The number '2' is located in the tens place
2. Since the number '3' is located in the ones place, it's telling the number '2' to stay the same
Stays the Same: 1,2,3,4
Goes Up: 5,6,7,8,etc
223 ⇒ 220
Number 1 is A
Number 2 is C

1) In this problem, the first thing to do is to enlist the categories:
workers time to clean # apartments
8 2h15 12
8 9 x
2) Note that the number of cleaners is the same. So, we can pick the ratios that fall under the category <em>time </em>and <em>#apartments</em>
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We need to convert that 2h 15 into decimal form before setting the ratios:

3) Now, we can set the ratios and solve for x:

Thus, the answer is 48