Subtract :

2.975 from 8.23

Converting the given decimals into like decimals, we have to subtract 2.975 from 8.230.

Subtracting columnwise, we get:

$\begin{array}{r} 8.230 \ -\phantom{0}2.975 \ \hline 5.255 \ \hline \end{array}$

Hence, the answer is 5.255