Odpowiedzi

2009-11-05T15:53:46+01:00
Celina -70 autografów
70-100%
ania- o 40% mniej
ania - 100%-40%= 60%
70-100%
x = 60%

70 * 60% / 100% - 42
Ania zebrała 42 autografy

ania o 40% wicej niz basia - 100% + 40% = 140%
140% = 42
100% = X

x= 42*100%/ 140% = 30
basia zebrala 30 autografow