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\sqrt{\frac{220}{127}}
Expand \frac{22}{12.7} by multiplying both numerator and the denominator by 10.
\frac{\sqrt{220}}{\sqrt{127}}
Rewrite the square root of the division \sqrt{\frac{220}{127}} as the division of square roots \frac{\sqrt{220}}{\sqrt{127}}.
\frac{2\sqrt{55}}{\sqrt{127}}
Factor 220=2^{2}\times 55. Rewrite the square root of the product \sqrt{2^{2}\times 55} as the product of square roots \sqrt{2^{2}}\sqrt{55}. Take the square root of 2^{2}.
\frac{2\sqrt{55}\sqrt{127}}{\left(\sqrt{127}\right)^{2}}
Rationalize the denominator of \frac{2\sqrt{55}}{\sqrt{127}} by multiplying numerator and denominator by \sqrt{127}.
\frac{2\sqrt{55}\sqrt{127}}{127}
The square of \sqrt{127} is 127.
\frac{2\sqrt{6985}}{127}
To multiply \sqrt{55} and \sqrt{127}, multiply the numbers under the square root.