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7-75/2 32-40/2 3-27/3 28-81-42/2
D.C.M=2×2=4 16-20/2 1-9/3 14-81-21/2
8-10/2 1-3/3 7-81-21/3
4-5 1-3 7-27-7/3
D.C.M=2⁴=16 M.C.M=3⁵=243 7-9-7/3
7-3-7/3
7-1-7/7
1-1-1 M.C.M=2³×3⁴×7=4536