Example

Rounding 18.379 to the Nearest Whole Number

To round 18.37918.379 to the nearest whole number, apply the four-step decimal rounding procedure:

  1. Locate the ones digit: In 18.37918.379, the digit in the ones place is 88.
  2. Look at the next digit: The digit immediately to the right of 88 is 33.
  3. Compare with 55: Because 3<53 < 5, leave the ones digit unchanged at 88.
  4. Remove trailing digits: Delete the 33, 77, and 99 (the entire decimal portion).

The rounded result is 1818. This example illustrates the round-down case: when the digit to the right of the target place is less than 55, the target digit stays the same and all digits to its right are removed.

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Updated 2026-05-02

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