Decreasing in the round, help please

I am awful when it comes to decreasing and have lost the rest of the pattern and don’t know the name of which I am knitting. Can someone help me figure out how to start decreasing 126 sts? Thank you!

What are you making? A sweater yoke or the crown of a hat…?.

I’m knitting a hat, my husband actually helped me figure the decreases out last night. :smiley: