Evaluate
\frac{2\sqrt{5}}{35}\approx 0.127775313
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\frac{2\sqrt{5}}{7\left(\sqrt{5}\right)^{2}}
Rationalize the denominator of \frac{2}{7\sqrt{5}} by multiplying numerator and denominator by \sqrt{5}.
\frac{2\sqrt{5}}{7\times 5}
The square of \sqrt{5} is 5.
\frac{2\sqrt{5}}{35}
Multiply 7 and 5 to get 35.
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