Question

Calcule: a) 25% de 214; b) 67% de 110; c) 41% de 67; d) 80% de 218; e) 5% de 89 = *

Answer 1

Resposta:

=> utilizando a Regra de três.

a) 25% de 214

214________100%

x__________25%

100x = 25 × 214

100x = 5350

x = 5350 ÷ 100

x = 53,5

b) 67% de 110

110________100%

x_________67%

100x = 67 × 110

100x = 7370

x = 7370 ÷ 100

x = 73,7

c) 41% de 67

67________100%

x_________41%

100x = 41 × 67

100x = 2747

x = 2747 ÷ 100

x = 27,47

d) 80% de 218

218________100%

x__________80%

100x = 80 × 218

100x = 17440

x = 17440 ÷ 100

x = 174,4

e) 5% de 89

89________100%

x_________5%

100x = 5 × 89

100x = 445

x = 445 ÷ 100

x = 4,45