Now that you know that every IP has 4 octets, lets take a closer look at on of the octets, octet 1. This octet has a decimal value of 147 which would represent a binary value of 10010011. Every binary value consist of 8 bits, either 1 or 0. If a bit is 1 it is considered "active" or on, if it is 0 it is "not active" or off. But how does 147 make 10010011?
Simple, take a look at the standard binary calculation table below. You see 8 numbers, which represent the 8 bits in a binary value. Place the binary value 10010011 underneath and see what happens.