Answer:The answer is 28.875Step-by-step explanation:231 divided by 8, this equals to 28.875.Now, here is the rounding part.But, before that, you may wonder how should we round a number?- First of all, we should locate the number to be rounded. Then, we are going to look at the next digit.If the number is 5 or more, we would add 1 to the preceding number and remove the rest.However, if the number is 4 or less, we add 0 and remove the rest.In this case, we are going to round a thousandth, but 5 is a thousandth, and there is no other digit located next to 5.Here is how we solve this problem:If there is no next digit that is located after the proceeding number ( like 5 ). We just keep the number as it is. So, no changes at all. ! And that's why the answer is still 28.875 :)