6.75×3/8+37.5%×1/4+37.5%=6.75×3/8+37.5%×(1/4+1)=6.75×0.375+0.375×5/4=0.375*(6.75+1.25)=0.375*8=3
6.75×3/8+37.5%×1/4+37.5%=6.75x3/8+3/8x0.25+3/8=(6.75+0.25+1)x3/8=8x3/8=3