Respostas

2014-07-18T13:29:56-03:00
60 = 100
x   = 5

100x = 300
x=300/100
x= 3

Desconto de R$ 3,00
Ela pagou R$ 57,00

1 5 1
2014-07-18T13:42:54-03:00
60 . 5 = 300

300 = 3
100

60 - 3 = 57