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Convert 16 from decimal to octal

(base 8) notation:

##### Power Test

Raise our base of 8 to a power

Start at 0 and increasing by 1 until it is >= 16

80 = 1

81 = 8

82 = 64 <--- Stop: This is greater than 16

Since 64 is greater than 16, we use 1 power less as our starting point which equals 1

##### Build octal notation

Work backwards from a power of 1

We start with a total sum of 0:

##### 81 = 8

The highest coefficient less than 7 we can multiply this by to stay under 16 is 2

Multiplying this coefficient by our original value, we get: 2 * 8 = 16

Add our new value to our running total, we get:
0 + 16 = 16

This = 16, so we assign our outside coefficient of 2 for this digit.

Our new sum becomes 16

Our octal notation is now equal to 2

##### 80 = 1

The highest coefficient less than 7 we can multiply this by to stay under 16 is 1

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

Add our new value to our running total, we get:
16 + 1 = 17

This is > 16, so we assign a 0 for this digit.

Our total sum remains the same at 16

Our octal notation is now equal to 20