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\(\frac{423134.846267-423133}{423133.846267+423134}=\frac{423133.846267+846247-423133}{423133.846267+423134}\)
\(=\frac{423133.846267+423134}{423133.846267+423134}=1\)
\(\frac{423134.846267-423133}{846267.423133+423134}=\frac{\left(423134+1\right).846267-423133}{846267.423133+423134}\)
\(\frac{423133.846267+846267-423133}{846267.423133-423134}=\frac{423133.846267-423134}{864267.423133-423134}=1\)
\(=\frac{\left(423133+1\right).846267-423133}{846267.423133+423134}=\frac{846267.423133+846267-423133}{846267.423133+423134}=\)
\(=\frac{846267.423133+423134}{846267.423133+423134}=1\)