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b)
c)¹/₈
a)
(0,20:1,40)*100%= ok. 14%
b)(1,20/1,40)*100%= ok.85%
b) 500%
c)1/8 = 0.125 = 12,5%
a)1,4zl - x
1,2zl-100%
1,4x100 / 1,2 = 117% czyli cena wzrosla o 17%
b) 1,4 : 1,2 x 100% = 85.7%