Question 1052499
W is the number of weeks.
{{{1200=800(1+(13/52)/100)^W}}}
{{{(1.0025)^W=3/2}}}
{{{W=log(1.0025,((3/2)))}}}
{{{W=log((3/2))/log((1.0025))}}}
{{{W=162.3887}}}
.
.
{{{0.3887*7=2.72}}}
162 weeks, 3 days 
3 years, 6 weeks, 3 days