Decreases in crochet are normally made by working 2 or more stitches together,however please note that the same methods of working 2 or more stitches together can also be used to create a multitude of pattern stitches and these are always given in crochet patterns.
Decrease Double Crochet - DC2tog-
1. Insert the hook into next stitch (or as required), wrap the yarn round the hook, and draw a loop through (Fig.1).
2. Repeat this step into the next stitch, (3 loops on hook) (Fig.2).
3. Wrap the yarn and draw through all 3 loops on hook - 1 double crochet decreased (Fig.3).