Question

A rectangular sign is cut down by 10% of its height and 30% of it's width. What percent of the original area remains?

(A) 30
(B) 37
(C) 57
(D) 63
(E) 70

Answer 1

Let's call the height h, and the width w. This is what remains:

90% of h or .9h
70% of w or .7w

The original area of the rectangle: w x h
The current area: .7w x .9h = (.7)(.9)(w x h) = .63 (w x h)

So the correct answer is...you can see it among the options.

Answer 2

is it D?