Sweater pattern pattern help

Charted Patterns
Decrease Rnd 1: With A, * k51 (7, 7), k2tog; rep from * around – 312 (248, 240) sts.
Continue in St st worked in rnds AND beg with Rnd 1 of chart, change yarn color following Chart II until all
8 rnds of Chart II are complete.
With A, knit 1 rnd.

Hello! Could someone please explain to me what the number between the parentheses refer to regarding this sweater decrease round? I understood that i have to knit 51 stitches then k2tog but what does the 7 refer to? Thanks in advance :slight_smile:

What is the name of your sweater pattern and designer?
The numbers likely refer to different sizes. So if you are making the first size, (k51, k2tog) and repeat the directions in the parentheses. You should have 312sts total after the round is finished.

For the second size, (k7, k2tog) so that you will end with 248sts.
It may help to go through the pattern and circle the numbers for your size just to make the knitting easier.