1. [tex]\frac{Species\ A}{Species\ B} = \frac{(3x^{2}y)^{2}}{6(xy)^{3}} = \frac{3x^{4}y^{2}}{6x^{3}y^{3}} = \frac{x}{2y}[/tex]
2. [tex]\frac{Species\ C}{Species\ D} = \frac{20\sqrt{xy}}{4\sqrt{x^{2}y}} = \frac{5}{\sqrt{x}} = \frac{5}{\sqrt{x}} * \frac{\sqrt{x}}{\sqrt{x}} = \frac{5\sqrt{x}}{\sqrt{x^{2}}} = \frac{5\sqrt{x}}{x}[/tex]
