Increasing & Decreasing in Crochet

How to increase

Within the round. Work 2 stitches in the same stitch. Space the increases evenly in the round. For example every 4th st or every other stitch depending on what the instructions indicate. In some  s there will be increases at odd places. Be sure to follow the instructions carefully

On the ends. Work 2 stitches in first or last stitch. This is the most often method used for increasing when working in rows.

Decreasing

How to decrease in hdc. Special Abbreviation 'hdcdec'
Yo insert hook in next st pull up a loop, insert hook again in next st and pull up another loop then yo and draw thread through all 4 lps on hook.

How to decrease in scInsert hook in st, pull up a loop, insert hook in next st and pull up another loop then yo and draw thread through all three lps on hook.