Annual growth rate of population is 16.3%
monthly growth rate = ?
Months in one year = 12
let x be the monthly growth of population.
16.3% = 0.163
1+ 0.163 = 1.163
Now, (1.163)¹/¹² = 1.01266
for monthly growth percent
1.01266 - 1 = 0.01266 = 0.01266 x 100 = 1.266%≈ 1.3%