Ratio and fraction, transfer of water from Container A to B.?

Question

The ratio of the capacity of Container A to the capacity of Container B was 4:1. 2/9 of Container A was filled with water. If all the water in Container A is poured into the empty Container B, what fraction of Container B would be filled with water?

Answer 1

The ratio of capacity of Container A to Container B, means container A holds 4 times as much water as container B. So if Container A is filled to 2/9 of capacity, then that water will fill 4 times more the capacity of Container B or 4 * 2/9 = 8/9.