Relax

Respuesta :

It should be after 5 years:
2100:2=1050 (after 1 year)
1050:2=525 (after 2 years)
525:2= 262.5 (after 3 years)
262.5:2= 131.25 (after 4 years)
131.25:2= 65.625 (after 5 years)