Select the correct answer from the drop down menu. Find the missing term. m-n/m^2-n^2+?/(m-1)(m-n)=2m/m^2-n^2 . Replace the question mark (?) with ___ to make the equation true.

Which problem would you use the following proportion to solve for? 24/x = 40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?