While it is useful for you to know how to calculate required amounts by using the definition of percent volume in volume, the method is time consuming. You are therefore advised to use the equation wherever possible and use the long approach as a check if you hit problems. Now, what was the equation you need to use? Drag the following to form the equation.


Concentration1
               
Quantity1
Concentration2
               
Quantity2

x
=
x


The basic equation for calculating percentages is:

Percentage =      Amount of Specific Item      x 100%
Total Amount Of All Items


You need to be able to calculate all three parts of this equation given two of the others ie you need to be able to calculate:

  1. percentage
  2. the amount of a specific item
  3. the total amount of all items

You can do all the calculations using arrangements of this one equation.