When you round, if the number you are rounding is more than 0, it will never be rounded down to 0. So 6.63 can never be rounded to 6.60 since 3 is more than 0. In order to round the hundredths, you need to look at the thousandths. The thousandths in 6.633 is the second 3. Since 3 is less than 5, the first 3 will remain the same. The correct answer is 6.63
