PLS HELP FIRST TO ANSWER GETS BRIANLEST

Just tell me how to set up the equation.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?