Odpowiedź:
1.
wyliczamy ilosc gosci ponizej 30 roku 80:4=20
nastepnie wyliczamy jaki to %
[tex] \frac{20}{80} \times 100 = \frac{100}{4} = 25[/tex]
odp. 25%
2.
[tex] \frac{14}{25} \times 100 = 56[/tex]
[tex] \frac{27}{20} \times 100 = 135[/tex]
[tex] \frac{7}{4} \times 100 = 150[/tex]
[tex] \frac{31}{40} \times 100 = \frac{155}{2} = 77 \frac{1}{2} [/tex]
[tex] \frac{4}{3} \times 100= \frac{400}{3} = 133 \frac{1}{3} [/tex]
[tex] \frac{7}{8} \times 100 = \frac{175}{2} = 82 \frac{1}{2} [/tex]
3.
[tex] \frac{130}{250} \times 100 = \frac{260}{5} = 52[/tex]
na zajecia dodatkowe uczeszcza 52% uczniow.
