Question

5/7 * (21/20 - 7/30) + 16/21:8/7

Answer 1

   5/7 * (21/20 - 7/30) + 16/21 : 8/7 = 5/7 * (63/60 - 14/60) + 16/21 * 7/8 =
= 5/7 * 49/60 + 2/3 = 7/12 + 8/12 = 1 3/12 = 1 1/4 = 1,25