Adapt CSS Made for Catch Responsive Pro

Good morning: Some time ago one of your technicians gave me the following code for my Puerto Rico By GPS site using the Catch Reponsive Pro theme (https://www.puertoricobygps.com) @media screen and (max-width: 480px) { img.alignleft, img.alignright, img.aligncenter{ width: 45% !important; } } The idea was to give me the ability to make the size of my images exactly to my liking on smartphones. Well, now I'm trying to use the same code on my Puerto Rico Photography site (https://www.puertoricophotography.com), using the Create Pro theme, and it doesn't work. Could you please tell me what I need to alter in order for it to work. Thank you.