Answer:
61/72
Explanation:
first find the lowest common denominator - basically in this case the lowest number that goes into 8 and 9 - 8 x 9 which is 72, then
8 goes into 72 9 times so do 9 x the numerator (5)
9 x 5 = 45
Do the same for the second fraction, 9 goes into 72 8 times so do 8 x numerator (2)
8 x 2 = 16
Now add 45+ 16 = 61 ( this is your numerator)
and you keep the denominator (72) the same, so the answer is 61/72