In a super market, the cost of a table lamp is $₹ 870$, on which$\frac{1}{5}$th is off. The same table lamp is available at an electric shop for$₹ 920$  with a discount of$\frac{1}{10}$th. From where should one buy the lamp? What is the difference in prices?

Do the following pair represent the same rational number?

$\frac{-7}{21}$ and $\frac{3}{9}$.

Do the following pair represent the same rational number: $\frac{-16}{20}$ and $\frac{20}{-25}$.

Do the following pair represent the same rational number: $\frac{-2}{-3}$ and $\frac{2}{3}$.

Do the following pair represent the same rational number: $\frac{-3}{5}$ and $\frac{-12}{20}$.

Do the following pair represent the same rational number: $\frac{8}{-5}$ and $\frac{-24}{15}$?

Does the following pair represent the same rational number: $\frac{1}{3}$ and $\frac{-1}{9}$?

Does the following pair represent the same rational number: $\frac{-5}{-9}$ and $\frac{5}{-9}$?

Fill in the blanks with the correct symbol using $>, <$ or $=$.

$\frac{5}{-7}$ _____ $\frac{2}{3}$