18=\(\frac{18}{1}\) -151515=\(\frac{-151515}{1}\) 7777=\(\frac{7777}{1}\)
-445=\(\frac{-445}{1}\) 252525=\(\frac{252525}{1}\) -1111=\(\frac{-1111}{1}\)
\(-\frac{151515}{252525}=-\frac{3}{5}\)
\(\frac{7777}{-1111}=-\frac{7777}{1111}=-\frac{7}{1}\)
\(\frac{18}{-445}=-\frac{18}{445}\)
\(\Rightarrow\frac{18}{-445}=-\frac{18}{445}\)
\(-\frac{151515}{252525}=-\frac{3\cdot89}{5\cdot89}=-\frac{267}{445}\)
\(\frac{7777}{-1111}=-\frac{7}{1}=\frac{-7\cdot445}{1\cdot445}=-\frac{3115}{445}\)