\(A = \dfrac{{Tr\% }}{{\left( {1 + r\% } \right)\left[ {{{\left( {1 + r\% } \right)}^N} - 1} \right]}}\)

\(A = \dfrac{{Tr}}{{\left( {1 + r} \right)\left[ {{{\left( {1 + r} \right)}^N} - 1} \right]}}\)

\(A = \dfrac{{T\left( {1 + r\% } \right)}}{{r\% \left[ {{{\left( {1 + r\% } \right)}^N} - 1} \right]}}\)        

\(A = \dfrac{{T\left( {1 + r} \right)\left[ {{{\left( {1 + r} \right)}^N} - 1} \right]}}{r}\)