$\text{Represent the rational numbers }\frac{2}{3},-\frac{5}{4}\text{ and }1\frac{1}{2}\text{ on a single number line. \lbrack Page No. 52\rbrack}$

$\frac{2}{3}$ lies between 0 and 1, dividing the segment [0, 1] into 3 equal parts and taking the 2nd division point.

$\frac{-5}{4} = -1\frac{1}{4}$ lies between -2 and -1, at $\frac{1}{4}$ of the way from -1 towards -2.

$1\frac{1}{2} = \frac{3}{2}$ lies exactly midway between 1 and 2.

Order on the line (left to right): $\frac{-5}{4} < \frac{2}{3} < \frac{3}{2}$