Answer
$d_i=-6.67cm$
Same side as the object
Virtual and Upright
$m=-0.534$
$h_i=0.534mm$
Work Step by Step
$f=\frac{1}{-7.00D}=-14.3cm$
$d_o=12.5cm$
$h_o=0.1cm$
$d_i=\frac{1}{\frac{1}{f}-\frac{1}{d_o}}=\frac{1}{\frac{1}{-14.3cm}-\frac{1}{12.5cm}}=-6.67cm$
The image is on the same side as the object. Therefore, it is a virtual and upright image.
$m=\frac{d_i}{d_o}=\frac{-6.67cm}{12.5cm}=-0.534$
The image is $h_i=0.534mm$, almost two times smaller than the ant.