It is very strange when longtime computer users and even broadband suppliers don’t understand bits and bytes. you’ must have heard people talking that computers run on  “a bunch of ones and zeros”. Yes, computers run on ones and zeros. It’s definitely a bit more complicated than that, but it’s not so complicated that we can’t understand it. These zeros and ones are based on a type of number system called a binary system, a system in which information can be expressed by combinations of the digits 0 and 1 with base 2s. The binary number system that is used in computers today was created by Gottfried Wilhelm Leibniz in 1679

In the binary number system, we have two possible digits per place (0,1), so we can refer to it as counting in base 2. Binary means that it is a number system based on 2s.Decimal means the number system is based on 10s. Any number is represented by using combinations of only two numerals: zero (0) and one (1). Computers use this binary number system to manipulate and store all of their data including numbers, words, videos, graphics, and music. The binary number is the most familiar number system to the digital systems, networking, and computer professionals. 

Each digit in binary can take one value of 0 or 1.There are very simple methods to convert decimals system to binary
In case you are interested please check at tutorials point
you can access rapid tables for automatic conversion  

How computers read Binar-bits and bytes

A computer has billions of (super tiny) digital circuits, which are incredibly simple. They are made up of switches. And a switch can only have two states: on or off.  And we can represent that on/off binary in yet another way: 1 and 0.

A single digit in binary is known as a  bit. Since we know that binary is base 2, and one digit can only ever be either a 0 or a 1, we also can deduce that a bit can only ever be comprised of either  0 or  1.
 8 bits (8 digits, between 0 and 9) make a byte.  A byte is so common in the way that computers interpret binary that it is considered a unit of computer memory. A single-byte can represent 256 different combinations. (8 powers of  2 is 256.).Two bytes is 65536 (2 to the power 16) and so on

A 16-bit machine would break up and process 16 bits at a time. The number of bits that are processed at a time is known as a computer word, so we can think of bits as the “letters” that make up a computer word. Most computers nowadays are 32 or 64 bits. In other words, your computer processes binary strings that are 32 or 64 digits long.

In terms of storing or transmitting data, one byte takes 8 times as much memory to store a bit. The terms kilo, mega, and Giga are associated with the decimal system. In Binary they are little different
                                           In computing 1 Kilo=1024,