You can use the process of elimination to solve this multiple choice problem.
The first portion of this verbal expression is "15 divided by a number", so you can figure out that the first portion of the written expression would be (15/n). So, your answer choices are now limited to A and B.
The next portion says decreased by 2. Whenever you see the word "decrease", it means subtraction. So, you know that your answer would be answer B.
Your final answer is (15 ÷ n) - 2
