I am barely computer literate and by NO means a math whiz. For most of you, this will be not only a no brainer, but very boring. All I can do is HOPE someone will help me. I'm an old lady who loves to make quilts and quilt block patterns. Here is my question.

I make what is called a "disappeari ng nine patch" quilt block. It is made by using 9 squares of fabric of equal size, sewn together to make one block. That block...