3/4+4/7. 5/6-1/84помогите

Question

3/4+4/7. 5/6-1/84помогите

Answer 1

7*3/4 + 4*4/7 = 21/28+16/28 = 37/28 = 1 9/28
14*5/6 - 1/84 = 70/84 - 1/84= 69/84

Answer 2

7*3/4 + 4*4/7 = 21/28+16/28 = 37/28 = 1 9/2814*5/6 - 1/84 = 70/84 - 1/84= 69/84