Option C Is Correct.
(326.4)8 = 82 x 3 + 81 x 2 + 80 x 6 . 8-1 x 4 = ( 214.5)10
To convert in hexa decimal i assume you already familiar with the conventional way there is also a shortcut which is only applicable if one base can be written in the power of another base eg.( r1)m = r2
(326.4)8 = (011010110.100)2 here we expanded every digit in three bits
3 |
2 |
6 |
. |
4 |
011 |
010 |
110 |
. |
100 |
(011010110.100)2 = (D6.8)16 here we grouped every 4 bits ( radix point taken as reference)
0000 |
1101 |
0110 |
. |
1000 |
0 |
D |
6 |
. |
8 |
NOTE : we may pad 0 bits for grouping.