6/3-4/7=... pake cara

6/3 - 4/7
= 42/21 - 12/21
= 30/21
= 1 9/21

6/3 - 4/7 = ....         penyebutnya disamakan dulu ( 3 dan 7 kpk nya 21 )
42/21 - 12/21 = 30/21 = 1 9/21 = 1 /3/7