Answer:
12.4
Step-by-step explanation:
If the last digit in the fractional part of 12.37 is less than 5, then simply remove the last digit of the fractional part.
If the last digit in the fractional part of 12.37 is 5 or more and the first digit in the fractional part is less than 9, then add 1 to the first digit of the fractional part and remove the second digit.
If the last digit in the fractional part of 12.37 is 5 or more and the first digit in the fractional part is 9 then add 1 to the Integer part and make the fractional part 0.
With 12.37, rule B applies and the answer is:
12.4
