Question

1) calcule as porcentagens
A-2% de 700

b-30% de 1200

C-150% de 600

D- 75% de 400

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Answer 1

regra de três

A)

2% 100

x 700

100x= 1.400

x= 1.400/100

x= 14

B)

30% 100

x 1200

100x= 36.000

x= 36.000/100

x= 360

C)

150% 100

x 600

100x= 90.000

x= 90.000/100

x= 900

D)

75% 100

x 400

100x= 30.000

x= 30.000/100

x= 300

Answer 2

Explicação passo-a-passo:

$a) \: \: \: 2\%700 \\ \\ \frac{2}{100} \times 700 = \\ \\ \frac{2}{1} \times 7 = \\ \\ 2 \times7 = \\ \\ 14$

$b) \: \: \: 30\%1200 = \\ \\ \frac{30}{100} \times 1200 = \\ \\ \frac{30}{1} \times 12 \\ \\ 30 \times 12 = \\ \\ 360$

$c) \: \: \: 150\%600 = \\ \\ \frac{150}{100} \times 600 = \\ \\ \frac{150}{1} \times 6 = \\ \\ 150 \times 6 = \\ \\ 900$

$d) \: \: \: 75\%400 \\ \\ \frac{75}{100} \times 400 = \\ \\ \frac{75}{1} \times 4 \\ \\ 75 \times 4 = \\ \\ 300$