Help and show the steps please

You receive the following order: Dextrose 2.5% solution 1000 mL You have dextrose 40% solution in stock. How much of the stock solution do you need to fill the order? You are tasked to make 2 mL of tobramycin 8% solution. You calculate that you need to use 1 mL of tobramycin 16% stock solution to make it. How much diluent will you need to use? You receive the following order: Dextrose 5% solution 100 mL You have dextrose 20% solution in stock. How much diluent do you need to fill the order? You have a 10% progesterone cream in stock. How much of the stock cream do you need to make 45 grams of 5% cream