Rajat has 5 containers which contain a, b, c, d and e litres of milk with 15, 10, 20, 25 and 30 litres of water, respectively. If, in a 6th empty container having 180 litre capacity, he mixes the liquid from containers in the ratio 5 : 3 : 2 : 1 : 7, taking a total of 90 litres from all the 5 containers and 40 litres of milk is further added to the 6th container, then % of milk out of the total liquid in the 6th container is (if each container contains 90 litres of liquid)