Answer: 89
Explanation:
If a decimal is being rounded to the nearest whole number then we are trying to eliminate the decimal. If the tenths value in the number is equal to or greater than 5, then you will make the ones digit go up by one.
88.6 the tenth digit is 6 and it is greater than 5 so you will make the ones digit go up by one more. The ones digit is 8 so you will get 9.
The number will then be 89