Your veterinarian is administering a sedative to your 50 pound dog. The sedative is mixed in saline solution. Unfortunately the solution is pre-mixed at 10% for a horse and it needs to be a 2.5% concentration to be administered at 0.7 ml per pound for your dog. How much saline water needs to be added to the current solution to reduce the concentration to 2.5% and have the correct dosage for the dog