99.898989 to 2 decimal
Consider 99.898
The second decimal place is 9, after the 9 is 8, and 8 is more than 5, so we round up the 9 to 10.
The extra 1 from the 10, moves over to the 8 after the decimal point.
≈ 99.90 to 2 decimal places.
I hope this helps.