Marvin says that all rhombuses are squares. aretha says that all squares are rhombuses. who is correct? explain.

Aretha is correct. Since a rhombus a is a quadrilateral with 4 equal sides in terms of length, (forming 4 right angles in each corner), it can be concluded that all squares are rhombuses. However, only some and not all rhombuses are squares because some rhombuses may have equal lengths but all corners don't form right angles. 

I'm gonna have to say about 13 percent