How to Convert 21003 to Binary

Here we will show you step-by-step how to convert the decimal number 21003 to binary.

First, note that decimal numbers use 10 digits (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9) and binary numbers use only 2 digits (0 and 1).

As we explain the steps to converting 21003 to binary, it is important to know the name of the parts of a division problem. In a problem like A divided by B equals C, A is the Dividend, B is the Divisor and C is the Quotient.

The Quotient has two parts. The Whole part and the Fractional part. The Fractional part is also known as the Remainder.

Step 1) Divide 21003 by 2 to get the Quotient. Keep the Whole part for the next step and set the Remainder aside.

Step 2) Divide the Whole part of the Quotient from Step 1 by 2. Again, keep the Whole part and set the Remainder aside.

Step 3) Repeat Step 2 above until the Whole part is 0.

Step 4) Write down the Remainders in reverse order to get the answer to 21003 as a binary.

Here we will show our work so you can follow along:

21003 ÷ 2 = 10501 with 1 remainder
10501 ÷ 2 = 5250 with 1 remainder
5250 ÷ 2 = 2625 with 0 remainder
2625 ÷ 2 = 1312 with 1 remainder
1312 ÷ 2 = 656 with 0 remainder
656 ÷ 2 = 328 with 0 remainder
328 ÷ 2 = 164 with 0 remainder
164 ÷ 2 = 82 with 0 remainder
82 ÷ 2 = 41 with 0 remainder
41 ÷ 2 = 20 with 1 remainder
20 ÷ 2 = 10 with 0 remainder
10 ÷ 2 = 5 with 0 remainder
5 ÷ 2 = 2 with 1 remainder
2 ÷ 2 = 1 with 0 remainder
1 ÷ 2 = 0 with 1 remainder

Then, when we put the remainders together in reverse order, we get the answer. The decimal number 21003 converted to binary is therefore:

101001000001011

So what we did on the page was to Convert A₁₀ to B₂, where A is the decimal number 21003 and B is the binary number 101001000001011. Which means that you can display decimal number 21003 to binary in mathematical terms as follows:

21003₁₀ = 101001000001011₂

Decimal to Binary Converter
Need another decimal number as a binary number? How to convert 21003 to binary is not all we know. Convert another decimal to binary below:

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