Let say, x =$$0.\overline{8}.$$
So, $$10x=8+0.\overline{8}=8+x.$$
or,$$9x=8.$$
or,$$x=\frac{8}{9}.$$
So, $$0.1\overline{8}=0.10+\frac{8}{90}=\frac{1}{10}+\frac{8}{90}=\frac{9+8}{90}=\frac{17}{90}.$$
A is correct choice.
Create a FREE account and get: