The square quilt block shown is used in a larger quilt. The four small squares in the block are congruent, and the four small vertical rectangles in the block that are not squares are also congruent. The total area of the shaded regions is what fraction of the total area of the block? Express your answer as a common fraction.

[asy]
fill((-10,0)--(-5,0)--(-5,5)--cycle,gray(0.7));
fill((-5,5)--(-5,10)--(0,10)--cycle,gray(0.7));
fill((0,0)--(0,10)--(10,10)--cycle,gray(0.7));
fill((0,0)--(-10,-10)--(0,-10)--cycle,gray(0.7));
fill((0,-10)--(5,-10)--(5,-5)--cycle,gray(0.7));
fill((5,-5)--(5,0)--(10,0)--cycle,gray(0.7));
draw((10,10)--(10,-10)--(-10,-10)--(-10,10)--cycle);
draw((-10,-10)--(10,10));
draw((0,10)--(0,-10));
draw((10,0)--(-10,0));
draw((-5,0)--(-5,10));
draw((5,0)--(5,-10));
[/asy]
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The square quilt block shown is used in a larger quilt. The four small squares in the block are congruent, and the four small vertical rectangles in the block that are not squares are also congruent. The total area of the shaded regions is what fraction of the total area of the block? Express your answer as a common fraction.

[asy]
fill((-10,0)--(-5,0)--(-5,5)--cycle,gray(0.7));
fill((-5,5)--(-5,10)--(0,10)--cycle,gray(0.7));
fill((0,0)--(0,10)--(10,10)--cycle,gray(0.7));
fill((0,0)--(-10,-10)--(0,-10)--cycle,gray(0.7));
fill((0,-10)--(5,-10)--(5,-5)--cycle,gray(0.7));
fill((5,-5)--(5,0)--(10,0)--cycle,gray(0.7));
draw((10,10)--(10,-10)--(-10,-10)--(-10,10)--cycle);
draw((-10,-10)--(10,10));
draw((0,10)--(0,-10));
draw((10,0)--(-10,0));
draw((-5,0)--(-5,10));
draw((5,0)--(5,-10));
[/asy]
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{3}{8}
The square quilt block shown is used in a larger quilt. The four small squares in the block are congruent, and the four small vertical rectangles in the block that are not squares are also congruent. The total area of the shaded regions is what fraction of the total area of the block? Express your answer as a common fraction.

[asy]
fill((-10,0)--(-5,0)--(-5,5)--cycle,gray(0.7));
fill((-5,5)--(-5,10)--(0,10)--cycle,gray(0.7));
fill((0,0)--(0,10)--(10,10)--cycle,gray(0.7));
fill((0,0)--(-10,-10)--(0,-10)--cycle,gray(0.7));
fill((0,-10)--(5,-10)--(5,-5)--cycle,gray(0.7));
fill((5,-5)--(5,0)--(10,0)--cycle,gray(0.7));
draw((10,10)--(10,-10)--(-10,-10)--(-10,10)--cycle);
draw((-10,-10)--(10,10));
draw((0,10)--(0,-10));
draw((10,0)--(-10,0));
draw((-5,0)--(-5,10));
draw((5,0)--(5,-10));
[/asy]
train