Show the fractions $\dfrac{2}{5}, \dfrac{3}{5}, \dfrac{4}{5}$ and $\dfrac{5}{5}$ on a number line.

Draw a straight line and mark a point O on it representing 0. Mark a point A on the right of O at unit length so that OA represents 1.

Now divide the line segment OA into 5 equal parts. Each part represents $\dfrac{1}{5}$.

Starting from O, mark the points at $\dfrac{1}{5}, \dfrac{2}{5}, \dfrac{3}{5}, \dfrac{4}{5}$ and $\dfrac{5}{5}$ (= 1).

Hence, the fractions $\dfrac{2}{5}, \dfrac{3}{5}, \dfrac{4}{5}$ and $\dfrac{5}{5}$ are represented on the number line as shown above.