$\begingroup$

removed - unclear question....

$\endgroup$5

1 Answer

$\begingroup$

$$\frac{3}{5}\cdot\frac{\sqrt{3}}{2}=\frac{3}{10}\cdot\sqrt{3}\Longleftrightarrow$$ $$\frac{3\cdot\sqrt{3}}{5\cdot2}=\frac{3}{10}\cdot\sqrt{3}\Longleftrightarrow$$ $$\frac{3\cdot\sqrt{3}}{10}=\frac{3}{10}\cdot\sqrt{3}\Longleftrightarrow$$ $$\frac{3\cdot\sqrt{3}}{10}=\frac{3\cdot\sqrt{3}}{10}$$

Because $2\cdot5=10$.

$\endgroup$