Question

a. 1. Calcule os percentuais abaixo: . 12% de 20 b. 30% de 80 c. 50% de 40 d. 9% de 99​

Answer 1

Explicação passo a passo:

a)

20 = 100%

X = 12%

100X = 20 × 12

100X = 240

X = 240 × 100

X = 2,4

b)

80 = 100%

X = 30%

100X = 80 × 30

100X = 2400

X = 2400 ÷ 100

X = 24

c)

40 = 100%

X = 50%

100X = 40 × 50

100X = 2000

X = 2000 ÷ 100

X = 20

d)

99 = 100%

X = 9%

100X = 99 × 9

100X = 891

X = 891 ÷ 100

X = 8,91