Shape front slope on a cardigan

I have a Rowan pattern: Holly. The cardigan has a st st placket and I need to decrease and slope the front on both right and left pieces. The attached pattern directions are not clear to me. Help anyone??
Patt 24 sts, work 2 tog, patt to end. (I did this)
Now it gets confusing:
Working all front slope decreases as set by last row, dec 1 st at front slope edge of 4th and foll 0 alt rows, then on 11 foll 4th rows, then on 1 foll 6th row.
I started with 59 sts and I’m supposed to end up with 45 sts.
I don’t understand???

Welcome to the forum!
These can be confusing directions. If you call the dec row that you just worked, row 1, then dec on row 5 and then rows 9,13,17,21,25,29,33,37,41,45,49. The final dec is on row 55.