Question

Calcule o valor das porcentagens: a)30% de 20. b) 15 % de 100. c) 70% de 250. d) 55% de 40.

Answer 1

Boa tarde!

Vamos calcular usando regras de três simples!

A) 20 --- 100%

x --- 30%

100x = 600

x = 600/100

x = 6

Resposta: 6

B) 100 --- 100%

x --- 15%

100x = 1.500

x = 1.500/100

x = 15

Resposta: 15

C) 250 --- 100%

x --- 70%

100x = 17.500

x = 17.500/100

x = 175

Resposta: 175

D) 40 --- 100%

x --- 55%

100x = 2.200

x = 2.200/100

x = 22

Resposta: 22