Evaluate
\frac{\sqrt{15}}{5}\approx 0.774596669
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\frac{3\sqrt{15}}{\left(\sqrt{15}\right)^{2}}
Rationalize the denominator of \frac{3}{\sqrt{15}} by multiplying numerator and denominator by \sqrt{15}.
\frac{3\sqrt{15}}{15}
The square of \sqrt{15} is 15.
\frac{1}{5}\sqrt{15}
Divide 3\sqrt{15} by 15 to get \frac{1}{5}\sqrt{15}.
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