assume cs:code, ds:data

data segment
    y db 25

data ends


code segment
begin:
   mov ax,data
   mov ds,ax
   mov al,y
   cbw
   mov bl,10
   div bl
   add  al,30h
   int  29h

   mov  al,ah
   add  al,30h
   int  29h

   mov  ax,4c00h
   int  21h
code ends

end begin