百分數(shù)和分數(shù)的互化

1、百分數(shù)和分數(shù)的互化,＝3÷5,＝0.6,＝60%,＝2÷7,≈0.286,＝28.6%,＝ 75％,＝ 16.7％,≈,商四位，留三位，百分數(shù)上落一位．,怎樣能很快地把分數(shù)化成百分數(shù)？,分數(shù),百分數(shù),先把分數(shù)化成小數(shù)，再化成,,23,75,4,3,12.5,125,8,1,把17％、40％、2.5％化成分數(shù)．,＝,2.5％＝,＝,＝,怎樣能很快地把百分數(shù)化成分數(shù)？,百分數(shù),分數(shù),先把百分數(shù)改寫成分數(shù)再約分,,百分數(shù)和

2、分數(shù)之間怎樣互化？,分數(shù),百分數(shù),先把分數(shù)化成小數(shù)，再化成,,,先把百分數(shù)改寫成分數(shù)再約分,＝ 16.7％,2.5％＝,＝,＝,把分數(shù)化成百分數(shù)，通常先把分數(shù)化成小數(shù)（除不盡時，通常保留三位小數(shù)），再把小數(shù)化成百分數(shù)；把百分數(shù)化成分數(shù)，先把百分數(shù)改寫成分數(shù)，能約分的要約成最簡分數(shù)．,分數(shù),百分數(shù),先把分數(shù)化成小數(shù)，再化成,,,先把百分數(shù)改寫成分數(shù)再約分,把下面各分數(shù)化成百分數(shù)．,把下面各百分數(shù)化成分數(shù)．,27％、40％、65％、