Question

Evan is earning some extra cash by mowing lawns. It takes Evan 6 ¾ hours to mow 3 lawns. The first lawn takes him 2 ⅞ hours and the second lawn takes him 1 ¾ hours to mow. How long did it take Evan to mow the third lawn?
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Answer 1

Hope this helps the answer is 2 1/8 the picture explains how i did it :)