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b) 15%*17= 15/100 *17 = 255/100 = 2,55
c) 28% * 12 = 28/100 * 12 = 336/100 = 3,36
d) 35% * 9 = 35/100 * 9 = 315/100 = 3,15
e) 55% * 60 = 55/100 * 60 = 3300/100 = 33
f) 3% * 200 = 3/100 * 200 = 600/100 = 6
100%-x
15%-17zł 17*100/15=113
100%-x
28%-12kg 12*100/28=43
100%-x
35%-9 9*100/35=26
100%-x
55%-60 60*100/55= 109
100%-x
3%-200 200*100/3=6667
100%-x
Mam nadzieję że pomogłam :D