2 images across on gallery for specific page while leaving other pages at 3 on phone

I have my site code set up to display 3 images across on the gallery on most pages however on the specific page (stills) I need it to display only 2 images across while maintaining the 3 image across gallery for every other page. 

Thank you for the help!

Can you share your website URL and this page?

https://www.charlieknightdop.com/stills (this is the page for 2 across) 

https://www.charlieknightdop.com/music-video (normal pages)

@Ziggy^

@Ziggy sadly that just put the text from below each image to above the image. 

Just now, charlieknight2204 said:

@Ziggy sadly that just put the text from below each image to above the image. 

Sorry, I gave you the wrong code, helping two people at once!

@Ziggy this is currently the custom Css I have, I have the 3 across at the moment that I want on other pages but on "stills" I want 2 across. See images below of what it is now and how I want it 

@Ziggythat worked thank you!

1 minute ago, charlieknight2204 said:

@Ziggythat worked thank you!

Glad I could help... second time around anyway!