Rounded numbers are easier to work with in your head. Rounded numbers are only
approximate. You can not get an exact answer with rounded numbers. Sometimes an
exact answer is non needed.

To round numbers to the nearest hundred, make the numbers that end in 1 through 49
into the next lower number that ends in 00. For example 424 rounded to the nearest
hundred would be 400. Numbers that have the last two digits of 50 or more should
be rounded up to the next even hundred. The number 988 rounded to the nearest
hundred would be 1000.