Quandaries
and Queries 

Parent of secondary child. Question: Assume 120 less 12% = 105.6, ie 120 minus a 12% discount is 105.6. If I know that 105.6 is a discount of 12% from x, how do I find x?? Help please!!!! David 

Hi David, I would first write a mathematical sentence (equation) that describes the statement
A 12% discount in $120 is 12% of 120 and 12% of 120 is ^{12}/_{100} 120 = 0.12 120. Thus the equation is
In the situation you describe you know the discount rate is 12% and you know the discounted price is $105.60, but you don't know the original price of $120. You call the original price $x so in this case the equation is
Thus
Divide both sides by 0.88 to get
Penny 

