What is 0.17 rounded to the nearest whole number?

0.17 rounded to the nearest whole number is 0 because the decimal part (0.17) is less than 0.5. When rounding decimals to the nearest whole number, you look at the digit immediately to the right of the decimal point. If it is 5 or greater, you round up; if it is less than 5, you round down. In this case, 0.17 rounds down to 0.