Subtract: 8,674.5 − 998.9 =

Line up the decimal points of the numbers involved in the subtraction. Begin subtracting the digits from right to left, starting with the ones place. In this case, 5 minus 9 is not possible, so we borrow 1 from the tens place. Subtract the digits in each corresponding place value. Determine the placement of the decimal point in the result. The original numbers had one decimal place each, so the result should also have one decimal place. Therefore, the result of subtracting 998.9 from 8,674.5 is 7,675.6.