Answer:
do we answer all of them are just one
9 has factors of 3*3.
2 is prime, so no factors.
from those two denominators, we can get the LCD of hmmm simply their product, namely 18.

now, recall that, to get the mixed fraction, we divide 89 ÷ 18, the quotient goes up front, the "4", and the remainder is the one atop, the "17".
I did this before and the answer is b
There are 8 sets of 21 cups in 168 cups so 9 times 8 is 72