Answer:
249.978
Explanation:
I'm assuming you meant to put a percentage sign after the 88.96. If that's not the case, lmk. If it is, to find the percentage of any number, simply take the percentage value and move the decimal place to the left twice.
Taking 88.96% of 281 = The product of 281 and .8896.
281 * .8896 = 249.9776
Rounded to the nearest thousandth, that would be 249.978.