Question 300208

{{{200=40(1+P)^5}}}
Divide both sides by 40. 
{{{(1+P)^5=5}}}
Take both sides to the (1/5) power.
{{{1+P=5^(1/5)}}}
{{{P=5^(1/5)-1}}} or approximately
{{{P=0.3797}}}