Question

June served 4/9 of 18 liters of fruit punch. How many liters does she have left?

Answer 1

She has 10 liters left because 4 times 18 is 72. Then 72 divided by 9 is 8. You then subtract 8 from 18 and get 10.

Answer 2

She has 10 liters left.  Find 4/9 of 18 by multiplying 4/9 and 18.  4/9 of 18 is 8, so she served 8 of the 18, leaving 10 liters.