Отметьте верные равенства.
\(\dfrac{5} {10}=\dfrac{45} {50}\)
\(\dfrac{2} {3}=\dfrac{48} {72}\)
\(\dfrac{63} {90}=\dfrac{7} {9}\)
\(\dfrac{9} {25}=\dfrac{18} {50}\)
\(\dfrac{1} {3}=\dfrac{2} {4}\)