What does increase mean when crocheting?
Increasing stitches (abbreviated inc) in crocheting is just what it sounds like. You add stitches to a crocheted row so that it has more stitches than the previous one.
How do you do a double crochet decrease?
To decrease in double crochet, work the first double crochet until only 2 loops are on the hook. Yarn over, place hook in next stitch, yarn over, pull through stitch, yarn over, pull through 2 loops (3 loops on hook). Yarn over, pull yarn through all 3 loops for a completed decrease.