# How do you simplify: 2/the square root of 5?

$\frac{2}{\sqrt{5}} = \frac{2 \sqrt{5}}{5}$
You can rationalise the denominator by multiplying both numerator and denominator by $\sqrt{5}$
$\frac{2}{\sqrt{5}} = \frac{2 \cdot \sqrt{5}}{\sqrt{5} \cdot \sqrt{5}} = \frac{2 \sqrt{5}}{5}$