College Board ? of the Day

Read the following SAT test question, then click on a button to select your answer.

If the length and width of rectangle A are 10 percent less and 30 percent less, respectively, than the length and width of rectangle B, the area of A is equal to what percent of the area of B?

1. 63%


2. 60%


3. 40%


4. 6%


5. 3%

Hint
If L stands for the length of rectangle B, then the length of rectangle A is 10% less, that is, L minus 10% of L, or 0.9L. Similarly, if W stands for B’s width, then A’s width is W minus 30% of W, or 0.7W.