Easy Way Convert Binary to Decimal

Here I want to share with you guys some trick to solved binary issue :D
Sometime you got confused when deal with binary in exam or even in your jobs. But actualy there is an simple way to finish this with simple way. 
Maybe you think that just simple open the dec to bin calculator then put the value to the field and just click convert bomb you got the result. But if you sit on the exam you can't do that man!
you have to understand the concep and how to calculate manualy fast and acurately.

again, you have remember this, the power of 2.
128   64   32   16   8   4   2   1

Here I give you some practice to convert dec to binary.

Dec = 191

191 - 128 = 63
63 - 32 = 31
31 - 16 = 15
15 - 8 = 7
7 - 4 = 3
3 - 2 = 1
1 - 1 = 0

128   64   32   16   8   4   2   1
  1      0     1     1    1   1   1   1

=>Bin = 10111111

Dec = 172
172 - 128 = 44
44 - 32 = 12
12 - 8 = 4
4 -4 = 0
128   64   32   16   8   4   2   1
  1      0     1     0    1   1   0   0

=>Bin = 10101100

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