Question

how many months are there in 2/5 of a century

Answer 1

479.999 months... 
this is equal to 2/5 = 0.4 century

Answer 2

480 (approx)
1century=100yrs
2/5=2/5 of 100 =40 yrs
1 month consists 12 yrs
40 will consist =40of 12
= 480 months