1per6 +4per9+7per12. pakai caranya

1/6 + 4/9 + 7/12 = 6/36 + 13/36 + 21/36 (kpk dari 6, 9, dan 12)
=40/36
=20/18
=10/9
= 1 1/9

1/6+4/9+7/2
=6/36+16/36+21/36
=6+16+21/36
=43/36
=1 7/36