Originally Posted by cjomomma
If you cut the backing in half so that you have 2 2yd pieces and then sew the longest sides together you should have a piece that is 72 X 80, if I am doing my math right. Now your piece will be big enough.
That's what I do and it works great.
Your math is close; if the selvedge, shrinkage, and seam allowance don't take away too much it should be plenty wide for the 75" dimension.