Application of Area Formulas

Circles are inscribed to the square as in the pictures. In which case is the uncovered area (yellow) the largest? Express the uncovered area as a percent of the square area.

Find the area of the yellow shape below. Assume that the the shape is what it looks like: the curves are certain circle parts.

Find the area of the shaded (red) area. Assume that the shapes are what they look like: a square and circle parts.