Tớ rút gọn luôn :))
\(\frac{45}{57}=\frac{15}{19}\)
\(\frac{4545}{5757}=\frac{4545:11}{5757:11}=\frac{15}{19}\)
\(\frac{454545}{575757}=\frac{454545:11}{575757:11}=\frac{15}{19}\)
Vì \(\frac{15}{19}=\frac{15}{19}=\frac{15}{19}\)
=> 3 phân số bằng nhau