Question

(2/1-2/81)-1/1-1/81)=?

Answer 1

........,.........................

Answer 2

$( \frac{2}{1} - \frac{2}{81} ) - ( \frac{1}{1} - \frac{1}{81} ) = \frac{160}{81} - \frac{80}{81} = \frac{80}{81}$