Simple...
you have \(\frac{3}{8}\) and \(\frac{2}{5}\)
Just subtract...but first find a common denominator...
Use 40 as the common denominator...
\(\frac{3}{8} * \frac{5}{5} = \frac{15}{40}\)
and
\(\frac{2}{5} * \frac{8}{8} = \frac{16}{40}\)
So, subtract,
\(\frac{15}{40}
-
\frac{16}{40}\)
=\(- \frac{1}{40}\)
Thus, your answer.
