The correct answer for the given question above would be option A. 2/3. Since both number 18 and number 27 are divisible by 9, 18 divided by 9 is 2, and 27 divided by 9 is 3 which will give you the answer of 2 and 3. So 18/27 in its lowest term is 2/3.
Divide 1000 by 8 which would give you 125. So they have 125 cans and they need to collect 8 times as many, meaning 8 times of what they have which is 125. And 125 times 8 is equal to 1000. YOU'RE WELCOME :D