答案有无数个?比如0.77777……,0.177777……,0.1277777……,0.12377777……,1.77777……任意一个循环小数都可以化成分数。比如,上面的几个循环小数都可以化成分数。
0.77777……=7/(10-1)=7/9,0.17777……=0.1+0.07777……=1/10+0.1*0.77777……=1/10+1/10*7/(10-1)
=1/10+7/90=16/90
0.127777……=0.12+0.01*0.7777……=12/100+1/100*7/9
=12/100+7/900
=115/900=23/180
0.1237777……=0.123+0.001*0.77777……=123/1000+1/1000*7/9
=1114/9000