a)
[tex]1050 - 100\% \\ x - 22\% \\ \\ x = \frac{1050 \times 22}{100} = \frac{105 \times 22}{10} = \\ = \frac{21 \times 22}{2} = 21 \times 11 = 231os.[/tex]
b)
[tex]1050 - 100\% \\ x - 40\% \\ \\ x = \frac{1050 \times 40}{100} = \frac{105 \times 4}{1} = 420os.[/tex]
c)
[tex]420 - 100\% \\ x - 30\% \\ \\ x = \frac{420 \times 30}{100} = 42 \times 3 = 126os.[/tex]
d)
[tex]1050 - 100\% \\ 126 - x \\ \\ x = \frac{126 \times 100}{1050} = \frac{1260}{105} = 12\%[/tex]
Myślę że pomogłem ;)
