From the chord theorem we have:

26% is equal to
26/100
divide the numerator and denominator by 2
13/50= is your answer!
:)
The area of the square is 81 sq in, and the area of the circule is (3.14)(3 in)^2, or approx 3.14(9) sq in, or approx 28.27 sq in.
Subtract: 81 sq in - 28.27 sq in = approx. 52.73 sq in.
The difference is 52.73 sq in; the square is larger, the circle smaller.
I think it is 3.25%. That is what I had got when I had did my math