Question

Evaluate: $\frac{12}{13}+\frac{-1}{12}$

Answer 1

$\frac{12}{13}+\frac{-1}{12}$
Now, Least Common Multiple (LCM) of the denominators will be
$=12\ast 13=156$
so, we can write the Equation as
$\frac{12\ast 12}{13\ast 12}+\frac{-1\ast 13}{12\ast 13}=\frac{144}{156}+\frac{-13}{156}=\frac{131}{156}$