Answer
$(8.01-7.50)/3.002=0.17$
Work Step by Step
1. Subtract the numbers inside the parentheses.
Rule for adding and subtracting: LEAST number of places to the decimal point. In this case, it's two decimal places.
$8.01-7.50=0.51$
2. The dividing rule is to count the Least Significant Figures. In this question, the Least SF is 2.
$0.51/3.002=0.16988...\approx0.17$