Сократите дробь \(-\frac{63ab^3}{81ab^2}\) \(\frac{7ab}{9}\) \(-\frac{7b}{9}\) \(\frac{7b}{9}\)
Задание

Сократите дробь \(-\frac{63ab^3}{81ab^2}\)

  • \(\frac{7ab}{9}\)
  • \(-\frac{7b}{9}\)
  • \(\frac{7b}{9}\)