\(\frac{2106}{7320}=\frac{351}{1220}\)
\(\frac{4212}{14604}=\frac{351}{1217}\)
\(\frac{6318}{21960}=\frac{351}{1220}\)
=> \(\frac{351}{1217}>\frac{351}{1220}\);\(\frac{351}{1217}>\frac{351}{1220}\)
Vậy : \(\frac{2106}{7320}< \frac{6318}{21960}\);\(\frac{4212}{14604}>\frac{6318}{21960}\)
Ta có:
\(\frac{2106}{7320}=\frac{2106:3}{7320:3}=\frac{720}{2440}\) (1)
\(\frac{4212}{14604}=\frac{4212:6}{14604:6}=\frac{702}{2434}\)
\(\frac{6218}{21960}=\frac{6218:9}{21960:9}=\frac{702}{2440}\) (2)
Từ (1) và (2)=>\(\frac{2106}{7320}=\frac{6318}{21960}\)