The 80-milliliter solution of sugar and water is 25% sugar. How much water (in milliliters) must be added to make a solution that is 5% sugar?  Choose the correct answer
A) 300 B) 320 C) 340 D) 360 E) 380
In the original solution the amount of sugar is 0.25*80= 
<gadget id="calculator">0.25*80</gadget>
<output>20</output>
20 ml.   Let the volume of the new solution be V.   0.05V=20 ml.   V=400 ml.   The amount of water we need to add is   400 - 80= 
<gadget id="calculator">  400 - 80</gadget>
<output>320</output>
320 ml.   The answer is 320.
<result>B</result>
The 80-milliliter solution of sugar and water is 25% sugar. How much water (in milliliters) must be added to make a solution that is 5% sugar?