26/39 = 2/3
55/77 = 5/7
39/65 = 3/5
25/35 = 5/7
51/85 = 3/5
38/57 = 2/3
=> 26/39 = 38/57
55/77 = 35/35
39/65 = 51/85
hok tốt
26/39 = 2/3
55/77 = 5/7
39/65 = 3/5
25/35 = 5/7
51/85 = 3/5
38/57 = 2/3
=> 26/39 = 38/57
55/77 = 35/35
39/65 = 51/85
\(\frac{26}{39}=\frac{2}{3}\)
\(\frac{55}{77}=\frac{5}{7}\)
\(\frac{25}{35}=\frac{5}{7}\)
\(\frac{51}{85}=\frac{3}{5}\)
\(\frac{38}{57}=\frac{2}{3}\)
\(=>\frac{26}{39}=\frac{38}{57},...,...\)