Respostas

2014-04-14T15:44:25-03:00

69     --------- 100%

X ---------------  12%

100 X = 828

X = 828 / 100

X = 8,28

20 4 20
2014-04-14T15:45:12-03:00
69x12/100= 8,28                 
69,00+8,28= 77,28 reais
16 4 16