mohon dengan caranya

[tex]2 \frac{1}{4} - 1 \frac{1}{2} + 3 \frac{3}{4} \\ = \frac{9}{4} - \frac{3}{2} + \frac{15}{4} \\ = \frac{9}{4} - \frac{6}{4} + \frac{15}{4} \\ = \frac{9 - 6 + 15}{4} \\ = \frac{18}{4} \\ = 4 \frac{2}{4} \\ = 4 \frac{1}{2} [/tex]