$ K_{t} = K_{0} \cdot (1 + \frac{ p}{100})^{t} $

$ K_{0} = \frac{ K_{t} }{(1 + \frac{ p}{100})^{t} } $

$ p = (^{t} \sqrt{\frac{K_{t} }{K_{0} }}-1)\cdot 100 $

$ t =\frac{\ln(K_{t} ) - \ln(K_{0} )}{\ln(1 + \frac{ p}{100})} $