What percentage of the square's area is colored blue?

What is the ratio of area colored as red and area colored as blue?

If blue rectangle area is equal to the sum of 3 squares areas combined as in image, what is relation between a,b,c & d?

In the figure, if ABCD and EFGC are squares with areas R and S respectively. What is the area of the blue region?

A quarter-circle with radius R is drawn. Inside it, two semicircles and a circle are drawn as shown in the below figure. If the area of the white colored region is (Pi*R^2)/X then find the value of X?

From the given figure, find the area of the colored regions x+y?