To round a number to three decimal places, we look at the fourth decimal digit. If the fourth digit is 5 or greater, we round up the third digit by adding 1. If it is less than 5, we keep the third digit as it is.
The number is 17.0145. The fourth decimal digit is 5. According to the standard rounding convention (rounding up if the digit is 5 or greater), the third digit 4 becomes 5. Thus, 17.0145 becomes 17.015.
The number is 21.0235. The fourth decimal digit is 5. Following the same rule, the third digit 3 becomes 4. Thus, 21.0235 becomes 21.024.
Final Answer: 17.015 and 21.024
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