Decimal 2 Binary


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Number we want to transform uses base X: we would like to transform this number into new one, that uses Y base. In this case we will use method of continuous dividing and multiplying (dividing numbers left of comma (,) with Y and multiplying numbers on the right side of comma, by Y - rational numbers). This method is best understood looking at these examples where X equals 10 (decimal base, B=10), and Y eqauls 2 (binary base, B=2)


Decimal System:


Base: 10
Digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9


Binary System:

Base: 2
Digits: 0, 1
Example: 27 (decimal) = 11011 2 (binary)




Decimal 2 Binary




Example


Transform 29 (decimal) into binary number - reading upwards, result is 111012


29 : 2 =  14 , remaining 1   20            last (smallest) digit
14 : 2 = 7 , remaining
0 21
7 : 2 = 3 , remaining 1 22
3 : 2 = 1 , remaining 1 23
1 : 2 = 0 , remaining 1 24 first digit

- end of procedure





Example

Transform 0,8125 (decimal) into binary number – reading downwards, result is 0,11012


0,8125  * 2 =      1, 625    2-1            first digit after zero
0,625 * 2 =
1, 25 2-2
0,25 * 2 = 0, 5 2-3
0,5 * 2 = 1, 0 2-4 last digit

0,0 end of procedure





Example

Transform 0,3 (decimal) into binary number – result is 0,01001 1001 1001… 2 shortly rounded = 0,010012


0,3  * 2 =      0, 6         2-1       first digit after zero
0,6 * 2 =
1, 2 2-2
--------
0,2 * 2 = 0, 4 2-3
0,4 * 2 = 0, 8 2-4
0,8 * 2 = 1, 6 2-5
0,6 * 2 = 1, 2 2-6
--------



procedure never ends





Example – Quick Method

Transform 53(decimal) into binary number using quick method


  53                                                                          25 + 24 + 22 + 20 =
- 32 -> 25 1*25 + 1*24 + 0*23 + 1*22 + 0*21 + 1*20 =

-------- 110101 2
21
- 16 -> 24
--------
5
- 4 -> 22
--------
1
- 1 -> 20
--------
0 -> end of procedure









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1 Responses to “Decimal 2 Binary”

  1. Anonymous Joselyn 

    There is a quicker method.

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