Odpowiedzi

2010-03-08T18:47:19+01:00
9 + 7 + 4 = 20
20 = 100%

9/20 x 100% = 45%

7/20 x 100% = 35%

4/20 x 100% = 20%

Anna otrzymała 45%, Barbara 35%, a Cecylia 20%.
2010-03-08T18:54:54+01:00
9+7+4=20

9*100% /20 = 900/20 = 45%

7*100%/20= 700/20=35%

4*100%/20= 400/20=20%