Question

what should be added to -1/3 to get -2/5​

Answer 1

let the number is X.

$\large\frac{-1}{3}$ + X = $\large\frac{-2}{5}$

X = $\large\frac{-2}{5}$ + $\large\frac{1}{3}$

X = $\large\frac{-1}{15}$