We have been given that Lynn has a watering can that holds 32 cups of water,and she fills it a quarter full.
It means the watering can has

Now, she waters 17 plants and each plant gets the same amount of water. Let us suppose that each plant gets x cups of water.
Thus, we have

Divide both sides by 17, we get

Therefore, each plant gets 0.47059 cups of water.