15×3/8+9×37.5%
=15×3/8+9×3/8
=（15+9）×3/8
=24×3/8
=9
14÷7/2÷12.5%
=14×2/7×0.125
=4×0.125
=0.5
3/5×25%+125%
=0.15+1.25
=1.4