Answer:
1. 4/7 = 16/28
Check:
(4/7)(4/4) = 16/28 = 16/28
2. 40/15 = 8/3
(40/15)/(5/5) = 8/3
3. 15/6 = 5/2
(15/6)/(3/3) = 5/2
4. 8/11 = 56/77
(8/11)(7/7) = 56/77
5. 9/2 = 63/14
(9/2)(7/7) = 63/14
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