Ta có:
\(\frac{42}{43}=\frac{43-1}{43}=1-\frac{1}{43}\)
\(\frac{17}{18}=\frac{18-1}{18}=1-\frac{1}{18}\)
\(\frac{14}{15}=\frac{15-1}{15}=1-\frac{1}{15}\)
\(\frac{26}{27}=\frac{27-1}{27}=1-\frac{1}{27}\)
\(\frac{32}{33}=\frac{33-1}{33}=1-\frac{1}{33}\)
Vì \(\frac{1}{15}>\frac{1}{18}>\frac{1}{27}>\frac{1}{33}>\frac{1}{43}\)
=>\(1-\frac{1}{15}