Question

qual a taxa de juros mensal equivalente de 40 ao ano

Answer 1

Uma taxa de 40% ao ao corresponde a

$\dfrac{40\%}{\text{ano}}\\\\\\ =\dfrac{40\%}{12\text{ meses}}\\\\\\ =\dfrac{40}{12}~\dfrac{\%}{\text{m\^es}}\\\\\\ =\dfrac{10}{3}~\dfrac{\%}{\text{m\^es}}\\\\\\ \approx3,33\,\%/\text{m\^es}$