Evaluate
\frac{9\sqrt{2}}{80}\approx 0.159099026
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\frac{9}{40\sqrt{2}}
Multiply 5 and 8 to get 40.
\frac{9\sqrt{2}}{40\left(\sqrt{2}\right)^{2}}
Rationalize the denominator of \frac{9}{40\sqrt{2}} by multiplying numerator and denominator by \sqrt{2}.
\frac{9\sqrt{2}}{40\times 2}
The square of \sqrt{2} is 2.
\frac{9\sqrt{2}}{80}
Multiply 40 and 2 to get 80.
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