How to repair the frayed hemline of Jeans and Khaki pants?

Dear Happy,

I have three sons and have mended many of their pants over the years. Please follow the below links for instructions:

 Repairing Jeans pants with frayed hemline 

 Repairing Khaki style pants with frayed hemline

To repair Jean pants with frayed hemlines without shortening the pants length: 

1. Use an old pair of jeans that is similar in colour.
2. Cut strips out with about 4cm more in length than the frayed section and about twice the height of the hem allowance plus 1cm.
3. Fold and press the strip in half along it's length.
4. Open the top stitches of the hem section with frays and insert the folded strip inside the hem, aligning the folded edge with the hemline.
5. Pin and baste it in place.
6. Sew the top stitch of the hem with a sewing machine jeans needle.
7. Cut the frayed threads.
8. Sew slip-stitches by hand around the edge that's frayed - you could also use zig-zag or multi-stitches by machine (sewing the new fabric in place).
9. Trim the extended edge of the new fabric from the hem allowance and whip stitch its top edge to the top edge of the original hem allowance (this will prevent it from fraying).
10. Press the hem.

To repair Khaki pants with frayed hemlines without shortening the pants length when you don't have a similar type fabric:

1. Turn the frayed pant inside out and cut out a strip from behind it's pocket (against the body)  
2. After cutting out the strip make sure to sew in the hole with another piece of fabric (it doesn't have to be the same exact fabric type). You could also just machine sew the top of the pocket to the pants with thread that is similar to the pant's colour (but this will make the pant's pocket unusable).
3. Repeat steps 1, 2 and 3 of the jeans repair.
4. Pin the new piece in place.
5. Clip a notch at the top left and right corners of the frayed section.
6. Fold and tuck the sides and top of the frayed section a bit inside the hem (try to create a rectangular shape with the fold - this will frame the new piece of fabric) and baste it in place.
7. Machine sew stitches around the frame close do the fold.
8. Re-sew the original top stitch line of the hem.
9. Trim the extended edge of the new fabric from the hem allowance and whip stitch it's top edge to the top edge of the original hem allowance (this will prevent it from fraying).
10. Press the hem.

I hope you found the above instructions helpful. Let me know how things turn out and if you have any questions!