Answer
$-\dfrac{3}{10}$
Work Step by Step
Make the fractions similar using their LCD, which is 10, to obtain:
$=\dfrac{1}{10} - \dfrac{4}{10}$
RECALL:
$a-b = a+(-b)$
Thus,
$\frac{1}{10} - \frac{4}{10}
\\= \frac{1}{10} + \frac{-4}{10}
\\=-(\frac{4}{10}-\frac{1}{10})
\\=-\frac{3}{10}$
