A BCD can be converted to Binary in three steps:-
Let's say your BCD value is
100100010001 and you want to convert it to it's Binary form.
Binary Coded Decimal or BCD is a set of binary encodings for decimal numbers used in early digital computers. In BCD, a binary sequence is used to represent each digit of the source decimal number
Binary is the numeric system of computers. Computers are so dumb they only understand 0s and 1s. Binary numbers have a base of 2.