Round 99.49 to the nearest whole number

The answer is

100 you always give it one more if its five or more

After the 99, the extra piece of a whole number is 0.49.

Since that's less than 0.5, it's not enough to add 1 to the 99,

so the nearest whole number is 99.

Another way to talk about it:

You have 99.49.

The next bigger whole number is 100. It's 0.51 away from 99.49.

The next smaller whole number is 99. It's only0.49 away from 99.49.

99 is nearer than 100, so 99 is the nearest whole number.