Rounding Decimals

Rounding is the process of adjusting the digits of a number to make it simpler and easier to work with, while keeping its value close to what it was.

Rounding to the nearest whole number means adjusting a decimal number to the closest whole number. If the decimal is 0.5 or higher, round up; if it's less than 0.5, round down.

The unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit.

To find the unit rate, divide the total quantity by the number of units. For example, if you earn $200 for 8 hours of work, divide 200 by 8 to find the rate per hour.

0.09

9%.

Look at the third decimal place (1). Since it is less than 5, you keep the second decimal place (7) the same, so 215.78.

Identify the place value to which you want to round (e.g., nearest whole number, tenth, hundredth).

If the digit is 5 or more, you round up the digit in the place you are rounding to.

If the digit is less than 5, you keep the digit in the place you are rounding to the same.