[tex]\displaystyle 35\% \ din \ 180 \\ \\ \frac{35}{100} \cdot180= \frac{35}{10}\cdot18= \frac{630}{10}=\boxed{63 } \\ \\ ----------------\\ x=? \\ 17\% \cdot x=102 \\ \\ \frac{17}{100} \cdot x =102 \\ \\ \frac{17x}{100}=102 \\ \\ 17x= 10200 \\ \\ \boxed{x=600}[/tex]
