Thread: Percent Mixture Need Help

How much pure water should be added to a 20% soap solution to make an 8% solution?

Originally Posted by MKN

How much pure water should be added to a 20% soap solution to make an 8% solution?

Let there was x amount of solution initially
so amount of soap in it is x/5
Let us add y amount of water to it
so
Percentage of soap is

so
12x = 8y
3x=2y
so y= 2x/3
Which means 0.67 times the initial amount of solution