常用的分数、小数及百分数的互化 1/2=0.5=50% 1/4=0.25=25% 3/4=0.75=75% 1/5=0.2=20% 2/5=0.4=40% 3/5=0.6=60% 4/5=0.8=80% 1/8=0.125=12.5% 3/8=0.375=37.5% 5/8=0.625=62.5% 7/8=0.875=87.5% 1/10=0.1=10% 1/16=0.0625=6.25% 1/20=0.05=5% 1/25=0.04=4% 1/40=0.025=2.5% 1/50=0.02=2% 1/100=0.01=1% 同步练习题 ①一种电视机,原来每台售价10000元,现在每台售价6000元,降低了百分之几? (10000-6000) ÷10000×100%=40%