Represent each of the following on the number line :

$2\dfrac{2}{5}$

Let O be the origin. Set off equal distances OA, AB, BC, etc., on right hand side of O, denoting 1, 2, 3, etc.

Take 2 full distances and divide BC into 5 equal parts and take 2 parts out of it to reach the point P.

Hence, the point P represents $2\dfrac{2}{5}$.