Замените проценты в виде дроби: 50%; 70%; 120%.

1. \(50\% = \frac{50}{100} = \frac{1}{2}\).
2. \(70\% = \frac{70}{100} = \frac{7}{10}\).
3. \(120\% = \frac{120}{100} = \frac{6}{5} = 1\frac{1}{5}\).

Ответ: \(50\% = \frac{1}{2}\); \(70\% = \frac{7}{10}\); \(120\% = \frac{6}{5}\).