Zhu Yuanzhang (1328-1398): A. was a Buddhist monk turned soldier, and joined an anti-Mongol rebellion B. drove the Yuan rulers from Khanbaligh in 1368, and proclaimed the Ming dynasty C. adopted the imperial name of Hongwu D. all of the above

the correct answer is:   "   3.6 % " .

          →   the unemployment rate is:   " 3.6 % " .

explanation:

to calculate the "unemployment rate" :

the "unemployment rate"   =

  [# of people unemployed] /   [working age population]   * 100 %   ;

                =   [9 million] / [250 million]     *   100 % ;

    →     note:   the units of "million" cancel out;

                    since:   " {million} / {million} = 1 " ;

                =   (9 / 250)   * 100 %   ;

                = 0.036 * 100 % ;

                =   3.6 %

answer:   the unemployment rate is:   " 3.6 % " .

i guess so you did not explain the answer clearly so i can't