Welcome to the forum!
Which size are you making?
The sleeve decreases are at each edge of every 12th row for the given number of dec rows for your size.
For the smallest size that’s rows 1,13,25. Then every 10th row for 6 dec rows: 35,45,55,65,75 and 85.
Not sure if that’s the question but you can always post again and let us know.
Hello thank you for your reply.
Apologies I’m new to the forum, posted the details without putting my explanation - a rookie error, Trying to help my Mum.
She is knitting to fit bust 36-38.
I’m new to patterns and my Mum is not but now at over 80 she is not sure how to tackle this part.
We worked out the left sleeve and she threw away our working out that I was going to rely on to help with the right.
Sue
It’s helpful to go through and mark which size you’re doing.
For the 2nd size:
Cast off 72 stitches at the beginning of the next 2 rows
This leaves 96 stitches.
Now shape right sleeve as follows:
Work 12 rows, ending with a wrong side row.
Decrease 1 stitch at each end of next and 3 following 12th rows
(so, calling the next row Row 1, decrease on Row 1, 13, 25, 37)
then on 6 following 10th rows
(Row 47, 57, 67, 77, 87, and 97)
This leaves 76 stitches.
Work 19 rows, ending on a wrong side row.
Increase 1 stitch at each end of next and following 10th row.
80 stitches
Work 5 rows, ending with a wrong side row.
Cast off.
I hope this helps!