It usually depends on the specific platform or app you're using. For many, you can look for a settings icon within the story interface and then find the sound option to toggle it off.
To turn off the sound on stories, first check the menu options of the app. Sometimes, there's a specific setting for audio that you can simply switch off. Also, make sure your device's volume is down if that affects it.
To turn off sound on Instagram Stories, you need to access the story. Once there, look for the settings within the story interface. The sound option will be there, and you can simply turn it off to enjoy silent stories.
Mario's Day Off could be about Mario taking a break from his usual adventures. Maybe he decides to visit his friends in the Mushroom Kingdom without having to rescue Princess Peach or deal with Bowser. He might enjoy a day of eating mushrooms, hopping around and just relaxing in the beautiful landscapes of the kingdom.