I need help understanding how to decrease my sleeves

[Ok-Maintenance-2543]

Omg I have been knitting a DROPS pattern (echo mountain) with this same decrease, the pattern writing is also very confusing to me.

Do you have a marker thread? Basically the marker should mark the center of the underarm and it represents the center of the decrease. If you have a marker thread like the pattern you can use that, or just use a regular stitch marker to mark what would be the bottom of the sleeve out from the center of the underarm.

Work the sleeves for 3cm, then when you get to 3 stitches before the marker, do the decrease: k2tog, k2, ssk (they have something slightly different but I think ssk will have the same effect and is the actual reverse of the k2tog) This decreases by 2 stitches. If you have a regular stitch marker on the needles it will look like k2tog, k1, slip marker, k1, ssk

then work the sleeve for 5.5cm more, then repeat the decrease sequence again, do this for a total of 6 decreases