a) $\frac{{50}}{{200}} = \frac{{25}}{{100}} = 25\% $
$\frac{{75}}{{300}} = \frac{{25}}{{100}} = 25\% $
$\frac{1}{4} = \frac{{25}}{{100}} = 25\% $
b) $5,2:100 = 5,2\% $
$110,6:100 = 110,6\% $
$0,5:100 = 0,5\% $
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