Odpowiedzi

2009-10-08T15:28:43+02:00
Odp:

ser zółty
12 zł ----- 100%
x ----- 105%

100x = 12*105
100x = 1260 / : 100
x = 12,60 zł

chleb
3,4zł ----- 100%
x ----- 120%

100 x = 3,4 * 120
100x = 408 / :100
x = 4,08zł

jogurt

1,2 ---- 100%
x ---- 110%

100 x = 1,2 * 110
100 x = 132 /: 100
x = 1,32zł
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2009-10-08T15:34:38+02:00
12 x 5% = 12 x 5:100 = 60:100 = 0.6 zł 12 + 0.6 = 12.6 - ser po podwyżce



3.40 x 20% = 3.40 x 20:100 =68:100 = 0.68zł 3.40 + 0.68 = 4.08 chleb po podwyzce




1.20 x 10% = 1.2 x 10:100= 12:100= 0.12zł 1.20 + 0.12 = 1.32 jogurt po podwyzce
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