Problema Solution
Anna's company has a big drop in revenue one year and she has to take a 21.7% pay cut. How much of a raise would it take to get her back to her original salary?
Answer provided by our tutors
21.7% is expressed as 0.217 as a decimal number
Numerically, however, this question is completely ambiguous. We could say that 'x' was the original salary, that 'y' is some'big drop' and the subsequent 21.7% drop could be expressed as "(x-y)-0.217*(x-y)". Let 'z' represent the raise in order to reach the original salary:
x=z+(x-y)-0.217(x-y)