Odpowiedzi

2009-11-07T16:54:59+01:00
A) 90/36 *100%=9000/36=250%

b)8,75/12,5*100%=875/12,5=70%

c)63,9/1420*100%=6390/1420=4,5%
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2009-11-07T16:58:47+01:00
A) x= 36; y=90
36*a% = 90
36a=9000
a=250

250%


b) x=12,5; y=8,75
12,5* b% = 8,75
12,5b=875
b=70

70%


c) x= 1420; y=63,9
1420*c% = 63,9
1420c=6390
c = 4,5

4,5%



Pozdrawiam! :)
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