修一条路,原计划每天修0.52千米,40天完成.实际每天比原计划每天多修0.13千米,实际用多少天?
÷50=0.12=.
= :24=5:8= :40= %
3÷ ==0.75=6: = %
3÷ ==0.6=6: = %.
3:5==9: == .