tolong jawab no 18 sama 19

18. x × 2/5 = 20%
x = 20/100 × 5/2
x = 100/200
x = 50/100
x = 5/10
x = 0,5

19. x / 1,5 = 5/6
x = 5/6 × 1,5
x = 1,25
x = 125/100
x = 1 25/100
x = 1 1/4