Mathematics · Mixtures and Alligations

The ratio of milk and water in container A is 5:2 and in container B is 3:2. A new mixture is formed in container C by mixing 20% of the total mixture from container A with 50% of the total mixture from container B. If the resulting ratio of milk and water in container C is 5:3, find the initial quantity of the mixture in container A as a percentage of the initial quantity of the mixture in container B.