According to rounding rules, for a positive number, if the fractional part to be dropped is equal to or greater than one-half, the preceding digit will be increased by one.

• A. Increased by one
• B. Decreased by one
• C. Remains the same
• D. Truncated to integer part

Answer: (A)

Rounding up happens when the part you drop is at least 0.5. For a positive number, if that dropped fractional part is equal to or greater than one-half, you increase the digit before the decimal by one. For example, 7.5 becomes 8, and 3.7 becomes 4—the units digit is raised by one to reflect rounding to the nearest whole number. If the fractional part were less than 0.5, you would keep the integer part as is (round down), and truncating would simply drop the fraction without changing the integer part. This is why the result in this scenario is an increase of the preceding digit by one.