The outcome of this refashion actually gave me the idea to pursue colour blocking in my futuure refashion projects.
My sister had 7/8 pants which she didn't wear, because she prefers full length pants. On the other hand, my husband had a pair of 3/4 which he wanted turned into shorts. To make them more comfortable, I used navy bias tape for the hem, allowing me to keep more length for length for lengthening the other pair. As for the 'stacking' result - it looked good. To reinforce the part of the paints suffering from the most wear and tear, I have ironed on the adhesive fabric.
Hope you've enjoyed this curvy refash!