Is the quotient of two rational numbers always a rational number explain

Whats the name of the vertical axis

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. ?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)