a)
[tex]110 - 100\% \\ x - 30\% \\ \\ x = \frac{110 \times 30\%}{100\%} = 11 \times 3 = 33[/tex]
b)
[tex]240 - 100\% \\ 60 - x \\ \\ x = \frac{60 \times 100\%}{240} = \frac{1 \times 100\%}{4} = 1 \times 25\% = 25\%[/tex]
c)
[tex]90 \%- 60 \\ 100\% - x \\ \\ x = \frac{100\% \times 60}{90\%} = \frac{100\% \times 2}{3\%} = \frac{200}{3} = 66 \frac{2}{3} [/tex]
d)
[tex]447 - 100\% \\ 33 - x \\ \\ x = \frac{33 \times 100\%}{447} = \frac{11 \times 100\%}{149} = \frac{1100\%}{149} = 7 \frac{57}{149} \%[/tex]
Myślę że pomogłem ;)
