please help i need it with formula at the excel

Required: You purchase a Treasury-bond futures contract with an initial margin requirement of 25% and a futures price of $118,900. The contract is traded on a $100,000 underlying par value bond. If the futures price falls to $106,000, what will be the percentage loss on your position? (Input the value as positive value. Do not round intermediate calculations. Round your answer to 2 decimal places.) Total percentage loss %