5/9 x 12/25 = 4/15
12/11 : 36/ 55 = 5/3
9/55 x 22 = 18/5
144/7 : 36 = 4/7
4 phần 15
5 phần 3
18 phần 5
4 phần 7
\(\frac{5}{9}x\frac{12}{25}=\frac{4}{15}\)
\(\frac{12}{11}:\frac{36}{55}=\frac{5}{3}\)
\(\frac{9}{55}x22=\frac{18}{5}\)
\(\frac{144}{7}:36=\frac{4}{7}\)
\(\frac{5}{9}\cdot\frac{12}{25}=\frac{12}{45}\)
\(\frac{12}{11}:\frac{36}{55}=\frac{12}{11}\cdot\frac{55}{36}=\frac{5}{3}\)
\(\frac{9}{55}\cdot22=\frac{18}{5}\)
\(\frac{144}{7}:36=\frac{144}{7}:\frac{36}{1}=\frac{144}{7}\cdot\frac{1}{36}=\frac{4}{7}\)
5/9 x 12/25 = 4/15
12/11 : 36/55 = 5/3
9/55 x 22 = 18/5
144/7 : 36 = 4/7