Evaluate
\frac{\sqrt{5}}{5}\approx 0.447213595
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\frac{30\sqrt{5}}{30\left(\sqrt{5}\right)^{2}}
Rationalize the denominator of \frac{30}{30\sqrt{5}} by multiplying numerator and denominator by \sqrt{5}.
\frac{30\sqrt{5}}{30\times 5}
The square of \sqrt{5} is 5.
\frac{\sqrt{5}}{5}
Cancel out 30 in both numerator and denominator.
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