1)28/50 - 39 persen 2)12/25 - 28 persen

[tex] \frac{28}{50} - 39 \%\\ \frac{28}{50} - \frac{39}{100} \\ \frac{56}{100} - \frac{39}{100} \\ \frac{17}{100} = 17\%[/tex]
[tex] \frac{12}{25} - 28\% \\ \frac{12}{25} - \frac{28}{100} \\ \frac{48}{100} - \frac{28}{100} \\ \frac{20}{100} = 20\%[/tex]