76乘60%加5分之3乘21 [4分之3减（16分 - 知识问答

76乘60%加5分之3乘21 [4分之3减（16分之7减0.25）]乘9分之17

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76乘60%加5分之3乘21
=76x3/5+3/5x21
=(76+21)x3/5
=97x3/5
=291/5
[4分之3减（16分之7减0.25）]乘9分之17
=(3/4-7/16+1/4)x17/9
=(1-7/16)x17/9
=9/16x17/9
=17/16

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