题目内容

【题目】把分数化成百分数

= = = = = =

= = = = = =

【答案】50%,25%,75%,20%,40%,60%,80%,12.5%,37.5%,62.5%,87.5%,10%

【解析】

试题分析:分数化百数,分母是100的分数,直接改写成百分数号即可,即去掉分母,添上百分号(%);一般分数化百分数,首先把分数化成小数,再把小数点向右移动两位,添上百分号(%)即可,如果不能化成有限小数,根据需要取近似值,一般百分号前保留一位小数.

解:(1)=0.5=50%;

(2)=0.25=25%;

(3)=0.75=75%;

(4)=0.2=20%;

(5)=0.4=40%;

(6)=0.6=60%;

(7)=0.8=80%;

(8)=0.125=12.5%;

(9)=0.375=37.5%;

(10)=0.625=62.5%;

(11)=0.875=87.5%;

(12)=0.1=10%.

故答案为:50%,25%,75%,20%,40%,60%,80%,12.5%,37.5%,62.5%,87.5%,10%.

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