Eduardo reduced the size of a painting to a height of 2 in what is the new width if it was originally 10 in wide and 20 in tall?

This question is not about painting, it's about math. It is a proportion problem: 2 is to 20 as "X" is to 10. Cross multiplication yields the equation 2*10 = X*20, which gives the answer X = 1.

For what it's worth, Eduardo is ending up with a pretty small painting...