Răspunsuri

2014-10-16T16:55:46+03:00
18%...............90
100%................. x
_________________
x=100x90/18
x=500
2014-10-16T16:57:26+03:00
18 supra 100  inmultit cu x = 90 => x= 90*100 supra 18 = 9000 supra 18 = 500