hasil dari 4/5 + 5/6, 7/8 + 3 1/4, 4/5 + 3/2. 7/8 - 5/6

4/5 + 5/6 = 4x6/5x6 + 5x5/6x5
               = 24/30 + 25/30 = 49/30

3 1/4 = 13/4

7/8 + 13/4 = 7x4/8x4 + 13x8/4x8
                 = 28/32 + 104/32 = 132/32

4/5 + 3/2 = 4x2/5x2 + 3x5/2x5
               = 8/10 + 15/10 = 23/10

7/8 - 5/6 = 7x6/8x6 - 5x8/6x8
              = 42/48 - 40/48 = 42-40/48 = 2/48

Semoga terbantu :D