Question 751440
Smaller pizza has diameter of 10 ins. Radius = 5 ins.
Larger pizza has diameter of 16 ins. Radius = 8 ins
Area of smaller pizza = pi*r^2 => 78.54 ins^2
Area of larger pizza = pi*r^2 =>  201.06 ins^2

        78.54 : 201.06
           1  : 2.56
hope this helps.
:-)