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31/66
No.
42/132 = 7/22
9/132 = 3/44
4/9
It is: 48/132 = 4/11 simplified
132/240 = 11/20
Yes.
62/80 = 31/40
83/132 cannot be simplified as hcf(83, 132) = 1.
31 over 62 can be simplified to one half
62/125
31/50