Question

A real estate agent agrees to sell an apartment complex according to the following commission schedule: $45,000 +25% of the selling price in excess of $900,000. Assuming that the complex will sell at some price between $900,000 and $1,100,000, inclusive, over what range does the agents commission vary? How does the commission vary as a percent of selling price?

Answer 1

100 x c/p
100 x (45K + .25p) / p
100 x (45K/p + .25) = commission as percent of selling price
try p = 1,100,000
100 x (45K/1100K + .25) =
Once you get that... you do this:
100 ((your answer here) + .25 ) = your final answer..