Answer
$\frac{100}{121}$
Work Step by Step
$\sqrt \frac{100}{121}=\frac{10}{11}$, which we know because $(\frac{10}{11})^{2}=\frac{10}{11}\times\frac{10}{11}=\frac{10\times10}{11\times11}=\frac{100}{121}$
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