Decimal floating point number to binary

Decimal floating point number to binary is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Your task is to create a program that takes a decimal floating point number and displays its binary representation and vice-versa: takes a floating point binary number and outputs its decimal representation.
The output would be something like this:
23.34375 => 10111.01011
1011.11101 => 11.90625