This question's it's about the order of operations. It stands for parenthesis, exponents, multiply, divide, add, and subtract. It can also go left too right. (PEMDAS)
First, do parenthesis.
Then exponents.
Multiply left to right.
Subtract left to right.
It change positive to negative sign.
Answer: →
<u><em>*The answer must have a negative sign.*</em></u>
Curt because if his time was 8/9 of Ian's time then that means he ran the mile in a fraction of Ian's time, so he finished the mile quicker. Curt ran faster.