Explanation:
2 3/4 = 11/4 (there are 4/4 in 1, so 2 have 8/4, and then plus 3/4 = 11/4).
1 4/7 = 11/7 (7/7 in 1 plus 4/7 = 11/7)
so, we actuality have
11/4 ÷ 11/7 = 11/4 × 7/11 = (7×11)/(4×11) = 7/4 = 1 3/4
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