Fixed point conversion, what is this supposed to be?

No.12142925 ViewReplyOriginalReport
I have completely forgotten how to do it, and there are few proper tutorials how to do it.
1101.0101 is two's compliment,
[0] is the indicator that turns it into
[2] is 2
[4] is 1/2 = 0.5
[6] is 1/8 = 0.125
negative values in two's compliment get extra minus
so, the answer should be -3.625, right? but that isn't the answer...