Question 338905
The area of a circle is,
{{{A=pi*R^2}}}
If the radius is increased 8%, then
{{{R2=R(1+8/100)=1.08R}}}
The new area is,
{{{A2=pi*R2^2=pi(1.08R)^2=1.1664*pi*R^2}}}
The ratio of new area to old area is 
{{{A2/A=1.1664}}} or a 16.64% increase in area.