For example:

Decimal to binary:

Divide by 2 until the result is 1.

Writing the remainder and the last 1 in reverse order from bottom to top is the result.

Such as 302

302/2 = 15 1 greater than 0.

15 1/2 = 75 1

75/2 = 37 remainder 1

37/2 = 18 1

18/2 = 9+0

9/2 = 4 remainder 1

4/2 = 2+0

2/2 = 1+0

So the binary number is10010110.

Can be abbreviated as "divide by two, take the remainder"

The same is true of other situations.