Jason has 4 gallons of hand sanitizer that contains 25% alcohol. He wants to make a hand sanitizer that contains 50% alcohol. How many gallons of pure alcohol should he add?

Respuesta :

4 gallons = 25% alcohol
He wants 50% alcohol, therefore, let’s double the amount.

8 gallons = 50% alcohol

Answer is 4 more gallons should be added to have 50% alcohol