2) Вычислите: б) \( \frac{12}{5} - \frac{3}{20}\)

б) \( \frac{12}{5} - \frac{3}{20} = \frac{12\cdot 4}{5 \cdot 4} - \frac{3}{20} = \frac{48}{20} - \frac{3}{20} = \frac{48-3}{20} = \frac{45}{20} = \frac{9}{4} = 2\frac{1}{4}\)