Rounded to the nearest month, how long will it take a town's population to:

b) Shrink from 40,000 to 32,500 if the annual rate of decline is 3?

PV = 40,000

FV = 32,500

n1 = 0.03/1

n = IN ( FV / PV ) / IN ( 1 + i ) In ( 32,500 / 40,000 ) / In ( 1 + 0.3 )

n = - 7.0246 however the answer is 6 years and 10 months

how did they get that ?