a) 15 minut: [tex]\frac{15}{60} = \frac{1}{4}[/tex]
b) 10 sekund: [tex]\frac{10}{60} = \frac{1}{6}[/tex] 25 sekund: [tex]\frac{25}{60} = \frac{5}{12}[/tex]
c) 9 godzin: [tex]\frac{9}{24} = \frac{3}{8}[/tex] 20 godzin: [tex]\frac{20}{24} = \frac{5}{6}[/tex]
d) 6 dni: [tex]\frac{6}{30} = \frac{1}{5}[/tex] 21 dni: [tex]\frac{21}{30} = \frac{7}{10}[/tex]
