Question

nunha escola de 900 alunos 42% sao rapazes calcule o numero de rapazes

Answer 1

$\sf\dfrac{900}{x}=\dfrac{100\%}{42\%}$

$\sf100x=37800$

$\sf x=\dfrac{37800}{100}$

$\boxed{\boxed{\sf x=378}}$