Question

what should be added to -2 to get 3 by 8

Answer 1

Hey Friend＼(^o^)／

Let the no. required be 'w'
so,

w + (-2) = 3/8

=> w = 3/8 + 2

=> w = 3+16/2

=> w = 19/2

Answer 2

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hey Mate!!!}}}$

Let the number be x.
So,
$x + ( - 2) = \frac{3}{8} \\ x = \frac{3}{8} + 2 \\ x = \frac{3 + 16 }{8} \\ x = \frac{19}{8}$

Hope it helps you...