Answer
$10101010_2$
Work Step by Step
$2|\underline{170}\ \ remainders$
$2|\underline{85}\ \ \ \ \ \ \ \ \ 0$
$2|\underline{42}\ \ \ \ \ \ \ \ \ 1$
$2|\underline{21}\ \ \ \ \ \ \ \ \ 0$
$2|\underline{10}\ \ \ \ \ \ \ \ \ 1$
$2|\underline5\ \ \ \ \ \ \ \ \ \ 0$
$2|\underline2\ \ \ \ \ \ \ \ \ \ 1$
$2|\underline1\ \ \ \ \ \ \ \ \ \ 0$
$\ \ \ \,0\ \ \ \ \ \ \ \ \ \ \ 1$ $\ \ \ \uparrow$ read digits up
