Concentration of First Solution
Parts of First Solution Needed
Required Concentration
Concentration of Second Solution
Parts of Second Solution Needed

Where:
Parts of First Source =Required Concentration-Concentration of Second Source
and
Parts of Second Source= Concentration of First Source- Required Concentration

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Have a go at the three questions on the following screen and remember,

AN ACTIVE INGREDIENT HAS A CONCENTRATION OF 100 %.

You have seen that you need to use the alligation Diagram to do the calculations. The answers to the following questions do not show the Diagram, only the results of using it. If you want to see the diagram itself, you can see it at any time by clicking on the button called "Diagram". "To clear the table from the screen, click on "Click to Continue".