Question 371542
28/39 divided by 20/9

(28/39) / (20/9) = (28/39) * (9/20)

                 = (28*9) / (39*20)
                 = (4*7*3*3) / (3*13*4*5)
4*3 cancels out
                 = (7*3)/ (13*5)
                 = 21/65