Which is greater between 5,45 and 5,54?

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,

What ratio is proportional to 18/21