Answer
$206_{eight}$
Work Step by Step
Start with the right-most column.
$5$ is less than $7$.
Borrow 1 $eight$ from the $7$ in the next column.
In base ten: $(8+5)-7=6$
Record: $6_{eight}$
$\begin{array}{llll}
& 4 & 7 & 5_{eight}\\
- & 2 & 6 & 7_{eight}\\
-- & -- & -- & --\\
& & & 6_{eight}
\end{array}$
Next column:
$(7-1)=6$ (we borrowed one eight)
$6-6=0$
(no borrowing)
Record the $0$.
$\begin{array}{llll}
& 4 & 7 & 5_{eight}\\
- & 2 & 6 & 7_{eight}\\
-- & -- & -- & --\\
& & 0 & 6_{eight}
\end{array}$
Next column:
$4-2=2$
Record the 2:
Result: $206_{eight}$