73乘75分之74怎么简算?8 又35分之2乘9怎么简算?

73×74/75
=(75-2)×74/75
=75×74/75-2×74/75
=74-2×74/75
=74-2+2/75
=72又2/75
8 又2/35*9
=282/35 *9
=2538/35