How to fix server scaled images issue?

•Right-click the image you want to open, then click Preview under Open With.

• Toggle to Tools and select Adjust Size.
• Make sure that Scale proportionately is chosen in order to preserve the image's aspect ratio (and prevent it from being crushed).
• Enter the desired width for your image.
• To save your freshly scaled image, click OK.

1. Establish the necessary image size.
2. Image Download and Re-Scaling.
3. Insert the resized image and replace the previous one.
4. Delete Cache from Your Website.
5. Check GTmetrix again with the URL.