In a square with a side length of 5cm, draw the largest circle with a radius of () and an area of (). The ratio of its area to that of the square is ()

In a square with a side length of 5cm, draw the largest circle with a radius of () and an area of (). The ratio of its area to that of the square is ()

The diameter of the circle is 5cm and the radius is 2.5cm
The circle area is 6.25 π cm2
The area ratio is 157:200