Answer
$\approx 98.38°$
Work Step by Step
There are $60$ seconds in $1$minute.
Hence
$45"=\frac{45}{60}'=0.75'$
Hence
$98°22'45"=98°(22+0.75)'$
$=98°22.75'$
There are $60$ minutes in $1$ degree.
Hence
$22.75'=\frac{22.75}{60}°\approx0.379°$
Hence
$98°22'45"\approx (98+0.379°)°$
$\approx 98.38°$ (to two decimal places)