How much greater is the combined area in square inches of the front and back of a rectangular sheet of paper measuring 11 inches by 13 inches than that of a rectangular sheet of paper measuring 6.5 inches by 11 inches?  Choose one:  A) 50%  B) 87%  C) 100%  D) 187%  E) 200%
Let's just look at the dimensions (no calculation needed).   With dimension 11 the same, the other dimension 13 is twice 6.5   Then the area will be double which means 100% greater.   The answer is 100%.
<result>C</result>
How much greater is the combined area in square inches of the front and back of a rectangular sheet of paper measuring 11 inches by 13 inches than that of a rectangular sheet of paper measuring 6.5 inches by 11 inches?