Question

Calcule as porcentagens
2% de 100
40% de 80
38% de 200
6% de 50
38% de 400
23% de 60
Por favor bota os cálculos também

Answer 1

Usando a regra de três
$a) \: \frac{100}{x} \times \frac{100}{2} \\ 100x = 100 \times 2 \\ x = \frac{200}{100} \\ x = 2$


$b) \frac{80}{x} \times \frac{100}{40} \\ 100x = 80 \times 40 \\ x = \frac{3200}{100} \\ x = 32$


$c) \frac{200}{x} \times \frac{100}{38} \\ 100x = 200 \times 38 \\ x = \frac{7600}{100} \\ x = 76$


$d) \frac{50}{x} \times \frac{100}{6} \\ 100x = 50 \times 6 \\ x = \frac{300}{100} \\ x = 3$

$e) \frac{400}{x} \times \frac{100}{38} \\ 100x = 400 \times 38 \\ x = \frac{15200}{100} \\ x = 152$

$f) \frac{60}{x} \times \frac{100}{23} \\ 100x = 60 \times 23 \\ x = \frac{1380}{100} \\ x = 13.8$

Espero ter ajudado ❤️