To round 153.86 to the nearest whole number, follow these steps:
Identify the decimal part: In the number 153.86, the first digit after the decimal point is 8.
Apply rounding rules: Since the first digit after the decimal point (8) is greater than or equal to 5, you round the number up by 1.
Final rounded result: The number becomes 154.
Thus, 153.86 rounded to the nearest whole number is 154.