Answer
$$\frac{\sqrt{28}}{\sqrt{77}}=\frac{2\sqrt{11}}{11}$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{\sqrt{28}}{\sqrt{77}}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{\sqrt{28}}{\sqrt{77}}\frac{\sqrt{77}}{\sqrt{77}} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}\frac{14\sqrt{11}}{77} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}\frac{ 14 \sqrt{ 11 } : \color{blue}{ 7 } } { 77 : \color{blue}{ 7 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{2\sqrt{11}}{11}\end{aligned} $$ | |
| ① | Multiply the numerator and denominator by the conjugate of the denominator . $$\color{blue}{ \sqrt{77}} $$. |
| ② | Multiply in a numerator. $$ \color{blue}{ \sqrt{28} } \cdot \sqrt{77} = 14 \sqrt{11} $$ Simplify denominator. $$ \color{blue}{ \sqrt{77} } \cdot \sqrt{77} = 77 $$ |
| ③ | Divide numerator and denominator by $ \color{blue}{ 7 } $. |
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