Пошаговое объяснение:

1/2 = (1*50)/(2*50) = 50/100

3/4 = (3*25)/(25*4) = 75/100

2/5 = (2*20)/(5*20) = 40/100

7/10 = (7*10)/(10*10) = 70/100

3/20 = (3*5)/(20*5) = 15/100

11/25 = (11*4)/(25*4) = 44/100

17/25 = (17*4)/(25*4) = 68/100

9/50 = (9*2)/(50*2) = 18/100