A painting which is 4 feet wide and 5 feet

long is surrounded by a rectangular frame

6-inches wide. What percent of the area of

the picture and the frame is occupied by

the frame?

A. 10 1/2

B. 20

C. 30

D. 33 1/3

E. 50

long is surrounded by a rectangular frame

6-inches wide. What percent of the area of

the picture and the frame is occupied by

the frame?

A. 10 1/2

B. 20

C. 30

D. 33 1/3

E. 50

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The answer is D.

I got B though. The area of the picture is 5 x 4 = 20 ft squared

The area of the picture of the frame is 5 x 5= 25 ft sqaure

Since the frame is 6 inches or half a foot wide I added a half an inch on both sides of the width of the painting, so from 4 the width now became 5. The length of the painting does not change though because adding a rectangualr frame which is 6 inches wide would not affect the length of the painting

Last, I subtracted the area of the pciture and frame from the area of the picture alone and got 5, I then divided this number by 25 and got 20% or choice B.

What did I do wrong?