The directions state, *3(slant to the right),yo,/3. I have never seen this before.
There are increases and decreases that slant to the right or left. If you go up to the video section and look at increases and decreases you can see what I mean.
In your case the YO doesn’t usually create a strong slant. It’s written a little odd. What are you making and can you post a link to the pattern? That always helps when you ask questions.