Evaluate
\frac{5\sqrt{57}}{19}\approx 1.986798536
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\frac{15}{\sqrt{57}}
Calculate the square root of 225 and get 15.
\frac{15\sqrt{57}}{\left(\sqrt{57}\right)^{2}}
Rationalize the denominator of \frac{15}{\sqrt{57}} by multiplying numerator and denominator by \sqrt{57}.
\frac{15\sqrt{57}}{57}
The square of \sqrt{57} is 57.
\frac{5}{19}\sqrt{57}
Divide 15\sqrt{57} by 57 to get \frac{5}{19}\sqrt{57}.
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