8.99 is 9.0 when rounded to one decimal place.
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to round to one decimal point all you have to do is move the decimal point once to the right for example: 0.808 becomes 08.08
53.8 to one decimal point is 53.8. When rounding a number to one decimal point, you look at the digit immediately to the right of the decimal point. If that digit is 5 or greater, you round up; if it is less than 5, you round down. In this case, the digit after the decimal point is 8, so we round up to 53.8.
5%
Any decimal less than one will round to zero.
To round 13.29 to 1 decimal point, you look at the digit in the second decimal place, which is 9. Since 9 is 5 or greater, you round up the digit in the first decimal place by adding 1 to it. Therefore, 13.29 rounded to 1 decimal point is 13.3.