Jika dijadikan pecahan 1 1/4 kg dikurang 1,2 kg hasilnya

11/4 – 12/10 = 110-48/40 = 62/40 = 31/20

1¼ = 1,25

1,25 – 1,2 = 0,05

0,05 = 5/100 = 1/20