Reading a pattern

#1

I am having trouble understanding a pattern it goes as follows:
Beg:RS dec row: K13(15,16,18 ), k2tog tbl, k1, k2tog, k13(15,16,18 ).
WS dec row: P12(14,15,17), p2tog, p1, p2tog tbl, p12(14,15,17)
Here is where I just dont get it…
cont as established, dec 2 sts every row and working 1 less st before and after each dec until you have 3 sts left. K3tog or p3tog (depengding on which side you are working on)-1st

when it says dec 2 stitches every row is that two more then already established decreases? and how do you work one less stitch?

#2

You do the decreases as written in the directions, which works out to 2 every row.

The other statement just sums up the results of these decreases, which will be to end up with 1 stitch less before and after the decrease stitches on each row.

#3

awsome thanks