Among1/9, 3/2, 4/5, 19/20 the largest fraction is ___________
rigorous method:
1/9 = 20/180
3/2 = 270/180
4/5 = 144/180
19/20 = 171/180 , 180 being the LCD
so what do you think?
(of course the answer was obvious, since 3/2 is the only fraction greater than 1)