SOLUTION: How much water must be evaporated from 20 ounces of a 1 % salt solution to make a 5 % salt solution?

Question 900833: How much water must be evaporated from 20 ounces of a 1 % salt solution to make a 5 % salt solution?
Found 3 solutions by ewatrrr, josgarithmetic, richwmiller:
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
water = Water
.99(20oz) - x = .95(20oz - x)
.04(20oz)/.05 = x
Answer by josgarithmetic(39616)   (Show Source): You can put this solution on YOUR website!
Ounce, as in of a pound.

Let w = how many ounces to be evaporated.

ounces
OR
POUND
Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
This is water removed and not replaced.
0.01*20=0.05*x
0.2=0.05x
x=4 new total amount
Remove 16 ounces
0.05*4=0.2
4/20=1/5=.20

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