## Denary to Binary: Subtraction

As you become more comfortable with the values of each binary column you can use the subtraction method.

- 141 contains one 128 leaving 13
- 13 contains no 64s
- 13 contains no 32s
- 13 contains no 16s
- 13 contains one 8 leaving 5
- 5 contains one 4 leaving 1
- 1 contains no 2s
- 1 contains one 1 leaving 0

We can then write this down as before as 10001101_{2}.

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