【4又1/6+20.5/(7-2/5-5.35)】*9/17

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【4又1/6+20.5/(7-2/5-5.35)】*9/17
【4又1/6+20.5/(7-2/5-5.35)】*9/17

【4又1/6+20.5/(7-2/5-5.35)】*9/17
=【25/6+20.5/(7-0.4-5.35)】*9/17
=【25/6+20.5/(5/4)】*9/17
=【25/6+82/5】*9/17
=【25/6+82/5】*9/17
=617/30*9/17
=1851/170