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100%- x
x= (100% * 4) / 28%
x=14.3
Pozdrawiam,
Kluuuuska ;)
0,28x=4 I*100
28x=400 I/28
x=14 2/7
100% - x
0,28x=4 /*100
28x=400 /:28
x=14,3