a,\(\frac{327}{326}=1+\frac{1}{326};\frac{326}{325}=1+\frac{1}{325}\)
\(\Rightarrow\frac{1}{326}< \frac{1}{325}\)
\(\Rightarrow\frac{327}{326}< \frac{326}{325}\)
b,\(\frac{16}{27}>\frac{15}{27}>\frac{15}{29}\)
\(\Rightarrow\frac{16}{27}>\frac{15}{29}\)