Question 166276
{{{A=P+Prt}}} Start with the given equation.



{{{A=P(1+rt)}}} Factor out the GCF "P".



{{{A/P=1+rt}}} Divide both sides by "P".



{{{A/P-1=rt}}} Subtract 1 from both sides.



{{{A/P-P/P=rt}}} Rewrite "1" as {{{P/P}}}.



{{{(A-P)/P=rt}}} Combine the fractions.



{{{(A-P)/(Pt)=r}}} Divide both sides by "t" to isolate "r".



So the answer is {{{r=(A-P)/(Pt)}}}