Question

calcule as porcentagem abaixo
30% de 180
50% de 790
15% de 300
2% de 25​

Answer 1

a) 30% de 180 = 54

$180 - - - 100\% \\ x - - - 30\%$

$30 \times 180 = 100x$

$x = \frac{5400}{100}$

$x = 54$

b) 50% de 790 = 395

$790 - - - 100\% \\ x - - - 50\%$

$50 \times 790 = 100x$

$x = \frac{39500}{100}$

$x = 395$

C) 15% de 300 = 45

$300 - - - 100\% \\ x - - - 15\%$

$15 \times 300 = 100 \: x \\ x = \frac{4500}{100} \\ x = 45$

d) 2% de 25 = 5

$25 - - - 100\% \\ x - - - 2\%$

$2 \times 25 = 100 \: x \\ x = \frac{50}{100} \\ x = 5$