Question 286184
10,5,4,3,2,1
start with 5 filled
5 into 4  plus 1 into 10
4 into 3 plus 1 into 10
3 into 2 plus 1 into 10
2 into 1 plus 1 into 10
so now the 1 is filled and there are 4 liters in the 10
4/10=40%