Question

Na classe de Astolfo há 42 alunos sendo que, desses, 20 são meninas.Determine a taxa percentual de meninos da sala. (Fórmula %vezes VI=VF)​

Answer 1

Se, dos 42 alunos, 20 são meninas, teremos:

$Meninos~=~Total~-~Meninas\\\\\\Meninos~=~42-20\\\\\\\boxed{Meninos~=~22}$

Sendo assim, percentualmente, a quantidade de meninos equivale a:

$Meninos\,(\%)~=~\dfrac{Meninos}{Total}\,.\,100\%\\\\\\Meninos\,(\%)~=~\dfrac{22}{42}\,.\,100\%\\\\\\Meninos\,(\%)~=~\dfrac{11}{21}\,.\,100\%\\\\\\Meninos\,(\%)~\approx~0,524\,.\,100\%\\\\\\\boxed{Meninos\,(\%)~\approx~52,4\%}$