\(\dfrac{254.399-145}{254+399.253}=\dfrac{101346-145}{254+100947}=1\)
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\(\dfrac{254.399-145}{254+399.253}\)=\(\dfrac{101346-145}{254+100947}\)=\(\dfrac{101201}{101201}\)=1
\(\dfrac{254.399-145}{254+399.253}\)
=\(\dfrac{\left(253+1\right)399-145}{254+399.253}\)
= \(\dfrac{399.253+399-145}{254+399.253}\)
=\(\dfrac{399.253+254}{254+399.253}\)
= 1