Given that

${\displaystyle \begin{array}{cc}\multicolumn{1}{c}{x}& =\frac{111110}{111111},\\ \multicolumn{1}{c}{y}& =\frac{222221}{222223},\\ \multicolumn{1}{c}{z}& =\frac{333331}{333334},\end{array}}$

which is the largest number and which is the smallest?