19999999999 1
------------------- =
99999999995 5
19999999999 1
-----------------= ----
99999999995 5
\(\frac{19999999999}{99999999995}\)=\(\frac{1}{5}\)=\(0.2\)
\(\frac{19999999999}{99999999995}/)/ = \(\frac{1}{5}/)/
1999999999/9999999995=1999999999:1999999999/9999999995:1999999999=1/5