0.125x3/4+1/8x8.25+12.5%=0.125x(0.75+8.25+1)=0.125x10=1125
0.125×4分之3+8分之1×8.25+12.5%=0.125×0.75+0.125×8.25+0.125=0.125×(0.75+8.25+1)=0.125×10=1.25