Evaluate and write in its simplest form: Allen needs to prepare a compound for the patient to pick up tomorrow. He needs to mix 2/5 of drug A, with 5/3 of drug B and 9/3 of drug C. What is the total amount of the drugs mixed together?
Determine the lowest common denominator and solve the calculation below. Remember to show your work: 2/5 + 5/3 + 9/3 = ?