doi ra phan tram :
120/40=................=.....................
2.25/3.05=.............=........................
135/183=.................=.......................
0.24/1.3=................=..............................
lam gium mimk voi [ dau / la dau chia ]
\(\frac{120}{40}=\frac{30}{10}=3\%\)
\(\frac{120}{40}=\frac{3}{1}=3\)
\(\frac{2.25}{3.05}=\frac{0.45}{0.61}=0.737705\)
\(\frac{135}{183}=\frac{45}{61}=0.737705\)
\(\frac{0.24}{1.3}=0.184615\)