Respostas

2013-10-06T13:53:45-03:00
450 ------ 100
 x --------- 8

100x = 3600
x = 3600/100
x = 36


36 ---- 100
x ------- 2

100x = 72
x = 72/100
x = 0,72
1 4 1
2013-10-06T13:55:28-03:00
8/100 de 450= 28 então 2/100de 28=0,56
1 3 1