(1 1/7 +4 2/3):2/7 (7 1/6 -2 5/8)•12 Помогите !!

Question

(1 1/7 +4 2/3):2/7
(7 1/6 -2 5/8)•12
Помогите !!

Answer 1

(1 1/7 + 4 2/3) : 2/7 = (8/7 + 14/4) : 2/7 = (32+98)/28 : 2/7 = 130/28 * 7/2 = 65/4 = 16 1/4

(7 1/6 - 2 5/8) * 12 = (43/6 - 21/8) * 12 = (172-63)/24 * 12 = 109/24 * 12/1 = 109/2 = 54 1/2