Rate of evaporation of water from a mixture of milk and water in sunlight is 2.5L/hour. At 10:00 AM quantity of milk was 90 liters more than the water and at 4:00 PM same day, ratio of milk to water becomes 8 : 1, then milk will be what percent of total quantity of mixture at 8:00 PM on same day? (Consider sunlight till 8:00 PM)