Question

160 reais representam 10% de quantos reais?

Answer 1

Regra de 3: 

     R$    %
    160   10
      x     100

10x = 160 . 100
10x = 16.000
x = 16.000 / 10
x = 1.600

Resposta: R$ 1.600,00 

Answer 2

$\sf \color{blue}{Olá,Manu !!}$

$\sf = {160} \times {100} /10 \\\sf = 16.000/10 \\\sf  \purple{ = 1.600}$

$\sf \orange {Tirando*a*Prova.}$

$\sf = 10\% = 0.10 \\\sf = 0.10 \: ⠂1.600 \\\sf = 160$

$\sf \color{blue}{Certo ✅}$