the number on the right
the 8 in this example
30.8 is more precise than 30 or 31
3
2
The "2".
4
7
It has no precision, since there is no following number.
7
There a four significant figures in the number 16.82, the last '2' determines the best precision available.
The precision is determined by the POSITION of the number 6 - NOT its value.
3
Always the last number, so in this example the precision is to hundredths.
2
The "2".
4
3
7
7