Pattern Cutting on reduce trousers size

On last Friday it was my pattern cutting lesson, in this session I learnt how to reduce a trousers size, from size 12 to size 10....WOW!
I been given a sheet of instruction on how to enlarge the trousers block but the task was to reduce it so the way to do this was follow the step of instruction but backward.

And here is the result.
As you can see the gray line was the original line and the brown line is the new line showing the trousers block is now reduce.

This is the result after the pattern was been cutten out.