A frame around a photo is 5 cm wide. The photograph is 20 cm long and 10 cm wide. What percentage of the entire area is the frame.

2 answers

total length = 20 + 10 = 30
total width = 10 + 10 = 20
so
total area = 600
but area of photo itself = 20*10 = 200
so frame area = 400
400/600 * 100 = 67 % is frame
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