Question

calcule 35% de 90
25% de 80
40% de 75
1% de 15

Answer 1

OI

Regra de três.

a) 35% de 90

100%-----------90

35%-------------x

100x = 35.90

100x = 3150

x = 3150/100

x = 31,5

b) 25% de 80

100%-------------80

25%--------------x

100x = 25.80

100x = 2000

x = 2000/100

x = 20

c) 40% de 75

100%--------------75

40%---------------x

100x = 40.75

100x = 3000

x = 3000/100

x = 30

d) 1% de 15

100%-------------15

1%-----------------x

100x = 1.15

100x = 15

x = 15/100

x = 0,15

Espero ter ajudado.