Question

Twenty pounds of a salt-water solution contains fifteen percent salt. How much water must be added to weaken the solution to twelve percent salt?
3 lb
5 lb
12 lb

Answer 1

@TeenaMathew

Answer 2

first, calculate how much salt is in 20 pounds of salt water
then, you can find the amount of water should be added by using:
20% = mass of salt/total mass * 100%
in which total mass = mass of salt water + mass of water

Answer 3

I said 5lb

Answer 4

@Shannon20150 sorry for mistype, I mean 12% = mass of salt/total mass * 100%
and yes, your answer is correct

Answer 5

Okay thank u