Grwoth rate aka interest rate
The rate at which the money had grown from one year to another year is known as 'interest rate' or growth rate.
Computing Growth rate
G = ( ( fv / pv ) ^ 1/n) -1
Finding the number of periods (N)
log (1+r) (FV/PV) = n
To calculate N
N = ln(FV/PV) / ln(1+r)
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