9/12=3/4 , 9/3=12/4 , 4/12=3/4 , 4/3=12/9
\(\dfrac{9}{12}=\dfrac{3}{4};\dfrac{4}{12}=\dfrac{3}{9};\dfrac{4}{3}=\dfrac{12}{9};\dfrac{9}{3}=\dfrac{12}{4}\)
\(\dfrac{9}{12}=\dfrac{3}{4};\dfrac{4}{12}=\dfrac{3}{9};\dfrac{4}{3}=\dfrac{12}{9};\dfrac{9}{3}=\dfrac{12}{4}\)