The whole value, or absolute value, of a number is its distance from zero on the number line, without considering its sign.
The absolute value of -12 is 12, and the absolute value of -16 is 16.
Since 12 is less than 16, the whole value of -12 (which is 12) is less than the whole value of -16 (which is 16).
Therefore, the greater whole value is that of -16.