Question

A)55% de ? =11
B)90% de ?= 135
C)120 % de ? = 30

Answer 1

regra de três

A)

55% 100

11 x

55x= 1100

x= 1100/ 55

x= 20

B)

90% 100

135 x

90x= 13500

x= 13500/ 90

x= 150

C)

120% 100

30 x

120x= 3000

x= 3000/ 120

x= 25