Answer:
3/7
Explanation:
1/3 = 7/3
so you have 7/3 and 5/7
find the common denominator and
devide the new denominator by the old denominator
and then multiply that number by the numinator of each fraction
and you should get
49/21 and 15/21
then you multiply the 15/21 by 2 because the questions asks you to determine the amount of water left after 2 days
and you get 30/21
then do 49/21 - 30/21 and you should get 19/21
3 goes into 19 and 21 so you devide 19 and 21 by 3 and you get 3/7