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Convert 100 from decimal to binary

(base 2) notation:

Power Test

Raise our base of 2 to a power

Start at 0 and increasing by 1 until it is >= 100

20 = 1

21 = 2

22 = 4

23 = 8

24 = 16

25 = 32

26 = 64

27 = 128 <--- Stop: This is greater than 100

Since 128 is greater than 100, we use 1 power less as our starting point which equals 6

Build binary notation

Work backwards from a power of 6

We start with a total sum of 0:


26 = 64

The highest coefficient less than 1 we can multiply this by to stay under 100 is 1

Multiplying this coefficient by our original value, we get: 1 * 64 = 64

Add our new value to our running total, we get:
0 + 64 = 64

This is <= 100, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 64

Our binary notation is now equal to 1


25 = 32

The highest coefficient less than 1 we can multiply this by to stay under 100 is 1

Multiplying this coefficient by our original value, we get: 1 * 32 = 32

Add our new value to our running total, we get:
64 + 32 = 96

This is <= 100, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 96

Our binary notation is now equal to 11


24 = 16

The highest coefficient less than 1 we can multiply this by to stay under 100 is 1

Multiplying this coefficient by our original value, we get: 1 * 16 = 16

Add our new value to our running total, we get:
96 + 16 = 112

This is > 100, so we assign a 0 for this digit.

Our total sum remains the same at 96

Our binary notation is now equal to 110


23 = 8

The highest coefficient less than 1 we can multiply this by to stay under 100 is 1

Multiplying this coefficient by our original value, we get: 1 * 8 = 8

Add our new value to our running total, we get:
96 + 8 = 104

This is > 100, so we assign a 0 for this digit.

Our total sum remains the same at 96

Our binary notation is now equal to 1100


22 = 4

The highest coefficient less than 1 we can multiply this by to stay under 100 is 1

Multiplying this coefficient by our original value, we get: 1 * 4 = 4

Add our new value to our running total, we get:
96 + 4 = 100

This = 100, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 100

Our binary notation is now equal to 11001


21 = 2

The highest coefficient less than 1 we can multiply this by to stay under 100 is 1

Multiplying this coefficient by our original value, we get: 1 * 2 = 2

Add our new value to our running total, we get:
100 + 2 = 102

This is > 100, so we assign a 0 for this digit.

Our total sum remains the same at 100

Our binary notation is now equal to 110010


20 = 1

The highest coefficient less than 1 we can multiply this by to stay under 100 is 1

Multiplying this coefficient by our original value, we get: 1 * 1 = 1

Add our new value to our running total, we get:
100 + 1 = 101

This is > 100, so we assign a 0 for this digit.

Our total sum remains the same at 100

Our binary notation is now equal to 1100100


Final Answer


We are done. 100 converted from decimal to binary notation equals 11001002.