[tex] \bf \dfrac{5 ^{2} }{ {2}^{2} } \cdot\dfrac{6 ^{3} }{ {15}^{3} }[/tex]
[tex]\bf \dfrac{5 ^{2} }{ {2}^{2} } \cdot\dfrac{ {2}^{3}\cdot 3^{3} }{ {{3}^{3}\cdot 5^{3}} }[/tex]
[tex]\bf \dfrac{5 ^{2} }{ {2}^{2} } \cdot\dfrac{ {2}^{3}\cdot \not3^{3} }{ { \not{3}^{3}\cdot 5^{3}} }[/tex]
[tex]\bf \dfrac{ 5 ^{2} }{ {2}^{2} } \cdot\dfrac{{2}^{3} }{ { 5^{3}} }[/tex]
[tex]\bf \dfrac{ \not5 ^{2} }{ \not{2}^{2} } \cdot\dfrac{ \not{2}^{3} }{ { \not5^{3}} }[/tex]
[tex]\bf \dfrac{1}{ 1 } \cdot\dfrac{ {2}^{1}}{ {5^{1}} }[/tex]
[tex] \boxed{\bf \dfrac {2}{5}}[/tex]
