Question

calcule as porcentagens correspondentes: a) 38% de 550kg b) 47% de 450 c) 65% de 108 d) 78% de 800 e) 27% de 650

Answer 1

a) 500 - 100%
x - 48%
Fazendo uma regra de três simples, se tem que:
100.x= 550.48
100x=26400
x=26400/100
x=264

b)450-100%
x-47%
100x=450.47
x=21150/100
x=211,5

C)108-100%
x-65%
100x=108.65
x=7020/100
x=7,2

d) 800-100%
X-78%
100x=800.78
X=62400/100
X=624

e)650-100%
X-27%
100x=650.27
X=17550/100
X=175,5

Answer 2

Ok, vamos lá...


a) 0,38×550 = 209

b) 0,47×450 = 211,5

c) 0,65×108 = 70,2

d) 0,78×800 = 624

e) 0,27×650 = 175,5