The correct answer should be<span> A. remember your topic and stay focused.
If you're not focused and you don't keep the topic in your mind you might wander off and get some info that is not relevant for your topic. </span>
28 = 7 % of X
28 = 0.07 of X
28 = 0.07x
28/0.07 = 0.07x/0.07
400 = X
$28.00 is 7 percent of 400 dollars.