Margins

Weekly Problem 16 - 2008
A 30cm x 40cm page of a book includes a 2cm margin on each side... What percentage of the page is occupied by the margins?
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Problem



A 30cm x 40cm page of a book includes a 2cm margin on each side, as shown. What percentage of the page is occupied by the margins?



Image
Margins

If you liked this question, here is an NRICH task which challenges you to use similar mathematical ideas.