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Convert 222 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 >= 222

2⁰ = 1

2¹ = 2

2² = 4

2³ = 8

2⁴ = 16

2⁵ = 32

2⁶ = 64

2⁷ = 128

2⁸ = 256 <--- Stop: This is greater than 222

Since 256 is greater than 222, we use 1 power less as our starting point which equals 7

Build binary notation

Work backwards from a power of 7

We start with a total sum of 0:

2⁷ = 128

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

Multiplying this coefficient by our original value, we get: 1 * 128 = 128

Add our new value to our running total, we get:
0 + 128 = 128

This is <= 222, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 128

Our binary notation is now equal to 1

2⁶ = 64

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

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

Add our new value to our running total, we get:
128 + 64 = 192

This is <= 222, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 192

Our binary notation is now equal to 11

2⁵ = 32

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

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

Add our new value to our running total, we get:
192 + 32 = 224

This is > 222, so we assign a 0 for this digit.

Our total sum remains the same at 192

Our binary notation is now equal to 110

2⁴ = 16

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

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

Add our new value to our running total, we get:
192 + 16 = 208

This is <= 222, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 208

Our binary notation is now equal to 1101

2³ = 8

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

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

Add our new value to our running total, we get:
208 + 8 = 216

This is <= 222, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 216

Our binary notation is now equal to 11011

2² = 4

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

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

Add our new value to our running total, we get:
216 + 4 = 220

This is <= 222, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 220

Our binary notation is now equal to 110111

2¹ = 2

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

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

Add our new value to our running total, we get:
220 + 2 = 222

This = 222, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 222

Our binary notation is now equal to 1101111

2⁰ = 1

The highest coefficient less than 1 we can multiply this by to stay under 222 is 1

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

Add our new value to our running total, we get:
222 + 1 = 223

This is > 222, so we assign a 0 for this digit.

Our total sum remains the same at 222

Our binary notation is now equal to 11011110

Final Answer