Answer:
2/81
Step-by-step explanation:
it says that 1/9 gallon has to be used over 9 days, so you would divide 1/9 by 9, which is basically multiplying 1/9 and 1/9, because you flip the second fraction around when dividing. 1/9 x 1/9 is 2/81, and it is already in simplest form, therefore the answer is 2/81 of a gallon. hope this helped
