Решение задачи 2

1. а) $$\frac{7}{20} = \frac{7 \times 5}{20 \times 5} = \frac{35}{100} = 35\%$$
2. б) $$\frac{5}{40} = \frac{1}{8} = \frac{1 \times 12.5}{8 \times 12.5} = \frac{12.5}{100} = 12.5\%$$
3. в) $$\frac{12}{60} = \frac{1}{5} = \frac{1 \times 20}{5 \times 20} = \frac{20}{100} = 20\%$$

Ответ: а) 35%, б) 12.5%, в) 20%