Answer:
84.5%
Explanation:
The area of the smaller square is ...
smaller square = (5.98 cm)^2 = 35.7604 cm^2
The area of the larger square is ...
larger square = (15.2 cm)^2 = 231.04 cm^2
So, the shaded area is ...
larger square - smaller square = (231.04 -35.7604) cm^2 = 195.2796 cm^2
Then a randomly chosen point will be in the shaded region this fraction of the time:
(shaded area)/(larger square area) = 195.2796/231.04 ≈ 0.84522 ≈ 84.5%