Answer: F)
Explanation:
1-1/4 = 3/4
-------------------
3/2 = 6/4
6/4-5/4 = 1/4
---------------------------
2 = 8/4
9/4-8/4 = 1/4
----------------------------
7/2 = 14/4
15/4-14/4 = 1/4
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