Question

quando obtemos 30% de 100, qual o valor que obtemos?

Answer 1

$\frac{30}{100} *100 = \boxed{\texttt{30}}$

Answer 2

100 -------------- 100 %
    x -------------- 30 %

100x = 30.100
100x = 3000
x = 3000 / 100
x = 30

30 % de 100 = 30