a)
[tex]70 - 100\% \\ x - 30\% \\ \\ x = \frac{70 \times 30}{100} = \frac{2100}{100} = 21kg[/tex]
b)
[tex]400 - 100\% \\ x - 60\% \\ \\ x = \frac{400 \times 60}{100} = \frac{4 \times 60}{1} = 240zl[/tex]
c)
[tex]40 - 100\% \\ x - 5\% \\ \\ x = \frac{40 \times 5}{100} = \frac{800}{100} = 8 {dm}^{2} [/tex]
d)
[tex]220 - 100\% \\ x - 120\% \\ \\ x = \frac{220 \times 120}{100} = 22 \times 12 = 264zl[/tex]
e)
[tex]240 - 100\% \\ x - 90\% \\ \\ x = \frac{240 \times 90}{100} = 24 \times 9 = 216km[/tex]
f)
[tex]1200 - 100\% \\ x - 80\% \\ \\ x = \frac{1200 \times 80}{100} = 12 \times 80 = 960 {m}^{2} [/tex]
