Вычислите: (3-9/8):5 : 2 1/5 - 2 1/8. Запишите решение и ответ.

(3 - 9/8) = (24/8 - 9/8) = 15/8.
15/8 : 5 = 15/40 = 3/8.
2 1/5 = 11/5.
2 1/8 = 17/8.
3/8 : 11/5 - 17/8 = (3/8) * (5/11) - 17/8 = 15/88 - 17/8 = 15/88 - (17*11)/88 = 15/88 - 187/88 = -172/88 = -43/22.