百分数怎样化成分数? 百分数怎样化成小数? 分数怎样化成百分数? 小数怎样化成百分数?

2025-03-26 17:59:31
推荐回答(3个)
回答1:

百分数化成分数:去掉百分号后作为分子,100作为分母,化简即可,比如20%=20/100=1/5
百分数化成小数:去掉百分号,小数点向左移动两位即可,比如20%=0.2
分数化成百分数:先化成小数,在把小数的小数点向右移动两位并加上百分号,比如1/5=0.2, 0.2=20%
小数化成百分数:小数点向右移动两倍(也就是扩大100倍)并加上百分号。

回答2:

1、百分数化分数的方法是:把百分数写成分母是100的分数,再把分数化简为最简分数;
2、百分数化小数的方法是:小数点向左移动两位,同时去掉百分号;
3、分数化百分数的方法是:用分子除以分母把它化成小数(除不尽时,除四位保留三位小数),再把小数点向右移动两位,同时天上百分号;
4、小数化百分数的方法是:先把小数点向右移动两位,同时添上百分号。

回答3:

约分会么? 百分数约分就能化成分数
分子上加小数点,后两位上就成了小数
反过来的过程就化成百分数了

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