What is the Nearest whole number to 9.13?

To round to the nearest whole number the tenths digit (the one after the decimal point) is the deciding digit whether to round up or down - if it is less than 5 round down, otherwise round up.

The tenths digit of 9.13 is 1 which is less than 5 so round down

9.13 → 9 to the nearest whole number.