Answer:
78
Explanation:
I always convert to hexadecimal first:
0100 = 4
1110 = E
(the matching of groups of 4 bits to one hex char is a lookup you can memorize)
so we have 4E, which is 4*16+14 = 78
Of course you can also go the long route:
01001110 = 0·2⁷+1·2⁶+0·2⁵+0·2⁴+1·2³+1·2²+1·2¹+0·2⁰ = 78
