Chuyen dau phay cua so thap phan a sang phai 1 hang thi duoc b. Suy ra b gap 10 lan a
Chuyen dau phay cua so thap phan a sang trai 1 hang duoc c. Suy ra a gap 10 lan c
Vay so b gap 100 lan c
Hieu so phan = nhau la : 100 - 1 = 99 ( phan )
So thap phan a la : 198,792 : 99 x 10 = 20,08
D/s : 20,08