Question

fiz um emprestimo de R$400,00 , no periodo de 8 meses paguei R$ 4.480,00 . Qual a taxa anual de juros?

Answer 1

i=j*100/C/t

i=4480-400*100/400/8

i=4080*100/400/8*12

i=408000/400/8*12

i=1020/8*12

i=127,5*12

i=1530

Resposta: Taxa de 1530%a.a