3/4*19.73+72*7/4+8.27*175%
=3/4*19.73+7/4*(72+8.27)
=3/4*19.73+7/4*80.23
=3/4*19.73+(1+3/4)*80.23
=3/4*(19.73+80.23)+80.23
=3/4*100+80.23
=75+80.23
=155.23