Let’s assume the breadth of the rectangle is x. According to the given information, the length of the rectangle is 20% more than its breadth, which means the length is x + 0.2x = 1.2x. The area of the rectangle is given by length * breadth, which is (1.2x) * x = 1.2x^2. The side of the square is equal to the breadth of the rectangle, which is x. The area of the square is given by side * side, which is x * x = x^2. The ratio of the area of the rectangle to the area of the square is (1.2x^2) / (x^2) = 1.2. Therefore, the ratio of the area of the rectangle to the area of the square is 1.2.