To round 30.92 to the nearest whole number, follow these steps:
Identify the decimal part: In the number 30.92, the first digit after the decimal point is 9.
Apply rounding rules: Since the first digit after the decimal point (9) is greater than or equal to 5, you round the number up by 1.
Final rounded result: The number becomes 31.
Thus, 30.92 rounded to the nearest whole number is 31.