Question

Alguém poderia dizer as 3 primeiras está ficando muito complicado responder estou no 7 ano e a professora passa exercicos que não está no meu nível de aprendizado

Answer 1

1.

$a)\\\frac{9}{10}.100\%\\\\\frac{900\%}{10}\\\\90\%\\\\b)\\\frac{11}{20}.100\%\\\\\frac{1100\%}{20}\\\\55\%\\\\c)\\\frac{5}{4}.100\%\\\\\frac{500\%}{4}\\\\125\%$

2.

$a)\\\frac{18}{180}.100\%\\\\\frac{1800\%}{180}\\\\10\%\\\\b)\\\frac{400}{500}.100\%\\\\\frac{40000\%}{500}\\\\80\%\\\\c)\\\frac{12}{240}.100\%\\\\\frac{1200\%}{240}\\\\5\%\\\\d)\\\frac{85}{1000}.100\%\\\\\frac{8500\%}{1000}\\\\8,5\%$

3.

a)

15% = 15/100

Portanto 15% de 3250 = 2350 x 15/100 = 352,5

b)

14,5% = 14,5/100 = 145/1000

Portanto 14,5% de 20135 = 20135 x 145/1000 = 2919,575

c)

85% = 85/100

Portanto 85% de 150220 = 150220 x 85/100 = 127687