What is 6.5 in binary? I just stumbled across a problem I never actually thought about before: decimals in binary. Can someone explain how to do it? Thanks!
Note: If possible, I'd like the answer in decimals not fractions, but this may not be possible.

Using a subscript to denote the base we're writing in, the answer is
$$6.5_{10}=110.1_2$$
In general, for any base $b$,
$${1\over b}=0.1_b$$
