\frac78
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Express as a common fraction: $\frac{. \overline{7} }{. \overline{8} }$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac78
Express as a common fraction: $\frac{. \overline{7} }{. \overline{8} }$
train