3/8 - 4/6 = 5/6 -5/12= 3/7 -7/3 =

9/24 - 16/24 = -7/24

10/12 - 5/12 = 5/12

9/21 - 49/21 = -40/21

maaf kalau salah

semua disederhanakan dulu
3/8 - 4/6 = 9/24 - 16/24 = - 7/24
5/6 - 5/12 = 10/12 - 5/12 = 5/12
3/7 - 7/3 = 9/21 - 49/21 = -40/21

semoga bener yaaa