1.
[tex]54\% = \frac{54}{100} = \frac{27}{50} [/tex]
[tex]75\% = \frac{75}{100} = \frac{3}{4} [/tex]
[tex]20\% = \frac{20}{100} = \frac{1}{5} [/tex]
[tex]350\% = 3 \frac{50}{100} = 3 \frac{1}{2} [/tex]
[tex]45\% = \frac{45}{100} = \frac{9}{20} [/tex]
[tex]15\% = \frac{15}{100} = \frac{3}{20} [/tex]
2.
[tex] \frac{3}{50} = \frac{6}{100} = 6\%[/tex]
[tex] \frac{28}{70} = \frac{4}{10} = \frac{40}{100} = 40\%[/tex]
[tex]0.4 = \frac{4}{10} = \frac{40}{100} = 40\%[/tex]
[tex]1.7 = 1 \frac{7}{10} = 1 \frac{70}{100} = 170\%[/tex]
[tex] \frac{4}{5} = \frac{8}{10} = \frac{80}{100} = 80\%[/tex]
3.
[tex]70cm = 70\%m[/tex]
[tex]12dni = \frac{12}{30} = \frac{4}{10} = \frac{40}{100} = 40\%mies[/tex]
[tex]30min = \frac{30}{60} = \frac{5}{10} = \frac{50}{100} = 50\%godz[/tex]
4.
[tex]160 - 100\% \\ x - 25\% \\ \\ x = \frac{25 \times 160}{100} = \frac{25 \times 40}{25} =40[/tex]
Odpowiedź: 40 złotych
5.
[tex]65 - 100\% \\ x - 10\% \\ \\ x = \frac{10 \times 65}{100} = \frac{1 \times 65}{10} = 6.5 [/tex]
[tex]65 + 6.5 = 71.5[/tex]
Odpowiedź: 71,5 złotych
6.
[tex]200 - 100\% \\ x - 40\% \\ \\ x = \frac{40 \times 200}{100} = \frac{40 \times 2}{1} = 80[/tex]
[tex]200 - 80 = 120[/tex]
Odpowiedź: 120
[tex]200 + 80 = 280[/tex]
Odpowiedź: 280
Myślę że pomogłem ;)
