Odpowiedzi

2009-10-24T14:34:04+02:00
780zł - 100%
600 - x%

600 + *600 = 780
(1+X) *600 = 780
1 +X 780 / 600
X = 780/600 - 1
X= 0.3 * 100 = 30
x= 30%

2009-10-24T14:45:19+02:00
Dane:
780zł - 100%
600 - x%
Szukane:
180zł -?%

600 + *600 = 780
(1+X) *600 = 780
1 +X 780 / 600
X = 780/600 - 1
X= 0.3 * 100 = 30
x= 30%