Odpowiedzi

2010-04-14T23:33:38+02:00
2010-04-14T23:34:06+02:00
A) 0,2 * 420 = 84
b) 0,17* 85 = 14,45
2010-04-14T23:35:07+02:00
A) 420-100%
x-20%
x=420*20/100
x=84
b)
85-100%
x-17%
x=18*85/100
x=15,3