STEP-BY-STEP P2TOG PURL TWO TOGETHER
1 Push the point of your right-hand needle through the first two stitches on your left-hand needle, going from right to left as you would for a purl stitch.
2 Bring yarn anti-clockwise around the needle, between the two needles.
3 Pull the yarn through both stitches, as you would when working a purl stitch, and drop both stitches from the left-hand needle.
4 Purling two stitches together decreases your stitch count by one, and the decrease stitch leans to the right. This is how a series looks on the right side of st st.