Binary numbers are numbers that use only two digits: 0 and 1. They are used by computers and other electronic devices because they are easy to store and process. Decimal numbers are numbers that use ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. They are used by humans because they are familiar and convenient.

To convert a decimal number to a binary number, we need to follow these steps:

1. Divide the decimal number by 2.

2. Write down the remainder (in binary).

3. Divide the quotient by 2.

4. Write down the remainder again.

5. Repeat steps 3-4 until you get a quotient of zero.

6. The binary number is the sequence of remainders in reverse order.

For example, let's convert 13 to binary:

13 / 2 = 6 remainder 1

6 / 2 = 3 remainder 0

3 / 2 = 1 remainder 1

1 / 2 = 0 remainder 1

So the binary representation of 13 is 1101.

I hope this helps! If you want more information, I found this [tutorial](youtu.be/KuE5z-bp5cQ) that explains it in more detail. Let me know if you have any other questions!

Hopefully, this blog post has helped you understand how to convert binary numbers to decimal numbers. Follow my website if you are interested in learning more about binary numbers and other number systems, I will soon upload other topics as well.