A teacher and several math students offer step-by-step solutions to word problems involving percents. Examples include, "How much HCl is in a 60-milliliter bottle that is marked 80% HCl?" and "Suppose the purchase price of a stereo...

A math teacher and his students provide step-by-step solutions to word problems dealing with proportions. Example questions include, "A recipe for 16 brownies calls for 2/3 cup of butter. How many brownies can be made from 1 cup of...

Students offer step-by-step solutions to math problems involving the multiplication and division of mixed numbers. In the left hand menu, click on Basic Mathematics, Mixed Numbers, Multiplication and Division.

Students provide step-by-step solutions to math problems involving the addition, multiplication, and division of mixed numbers. In the left hand menu, click on Basic Mathematics, Mixed Numbers, Multiple Operations.