Decimal number 183 to binary:

   183 / 2 = 91 + 1/2
    91 / 2 = 45 + 1/2
    45 / 2 = 22 + 1/2
    22 / 2 = 11 + 0/2
    11 / 2 =  5 + 1/2
     5 / 2 =  2 + 1/2
     2 / 2 =  1 + 0/2
     1 / 2 =  0 + 1/2

So the binary representation is 10110111. Let's check back

     1    0    1    1    0    1    1    1        (binary digit)
     128  64   32   16   8    4    2    1        (2^i)

     128 + 0 + 32 + 16 + 0 +  4  + 2  + 1 = 183

Convert binary number 1001101 into decimal representation.

   1    0    0    1    1    0   1    (binary digit)
   64   32   16   8    4    2   1    (2^i)

   64 + 0  + 0  + 8  + 4  + 0 + 1 = 77

So, the decimal value is 77.