a)
[tex]120 - 100\% \\ x - 10\% \\ \\ x = \frac{120 \times 10}{100} = \frac{120 \times 1}{10} = \frac{120}{10} = 12[/tex]
b)
[tex]120 - 100\% \\ x - 70\% \\ \\ x = \frac{120 \times 70}{100} = \frac{6 \times 70}{5} = \frac{420}{5} = 84[/tex]
Myślę że pomogłem ;)
