Songfacts®:

• Here, Grupo Frontera link up with Bad Bunny to tell the story of a person who is still pining for his ex. The song is a romantic cumbia-norteño, a genre of music that combines two traditional styles of music from Mexico and Colombia: cumbia and norteño.
• Que si me ven con otra en una disco solo es perdiendo el tiempo
  Baby, ¿pa' qué te miento?
  Eso de que me vieron feliz, no, no es cierto
  
  Translates as:
  That if they see me with another girl at the disco, it's just wasting time
  Baby, why will I lie to you?
  That thing about how they saw me happy, no, it's not true
  
  The song kicks off with the chorus where Grupo Frontera frontman Payo Solís spills the beans on a heart-wrenching story. With only 1% battery left on his phone, he's about to tell his former flame how much he misses her. The title, "Un x100to," is a spin on the Spanish term for one percent ("un por ciento").
  
  Solís takes responsibility for the relationship's demise, and he's filled with remorse. He's not over it yet, wasting time with other women to cope, but there's only one person he wants.
• Ya nada me hace reír
  Solo cuando veo las fotos y los vídeos que tengo de ti
  Salí con otra para olvidarte y tenía el perfume que te gusta a ti
  
  Translates as:
  Nothing makes me smile anymore
  Only when I see the photos and videos I have of you
  I went out with another girl to forget you and she was wearing the perfume that you like
  
  To add insult to injury, Solís laughs only at old photos and videos of his ex, the only source of happiness. He tried dating someone else, but she wore the same perfume as his ex. Total bummer.
• Borracho viendo tus fotos, me duele ver que tú sí has mejorado
  No tienes días grises, ya no te duelen las cicatrices
  
  Translates as:
  Drunk looking at your photos, it hurts to see that you have improved
  You don't have gray days, the scars no longer hurt
  
  Things get worse when Solís drunkenly scrolls through his ex's social media. She's thriving since they broke up, leaving him to wonder if he did her a favor.
• On the second verse, Bad Bunny, fueled by tequila, falls to his ex's feet, begging for a second chance. He drowns his sorrows with the guys, but it always leads to the same hollow feeling.
• Latin hitmakers Edgar Barrera and Marco "MAG" Borrero produced the romantic cumbia-norteño.
  
  Miami-based Mexican songwriter/producer Edgar Barrera also worked with Grupo Frontera on their collaborations with Fuerza Regida ("Bebe Dame") and Carín León ("Que Vuelvas").
  
  Puerto Rican-Dominican producer MAG co-produced 14 out of the 23 tracks on Bad Bunny's 2022 Un Verano Sin Ti album.
• Bad Bunny gave fans a sneak peek of the track on his TikTok account on April 16, 2023, where he showed off his cumbia dance moves while belting out the nostalgic lyrics. He and Grupo Frontera unleashed the full collaboration the following day.
• Despite being a big-time regional Mexican music enthusiast, this only marks Bad Bunny's second regional Mexican collab. Previously, he teamed up with Natanael Cano for a "Soy el Diablo" remix, a corrido.
  
  "I really love Grupo Frontera because I think they have a lot of feelings in their songs," Bad Bunny told Apple Music's Zane Lowe. "I love the way that they perform and they made it with the heart just like me."
• The official music video features Bad Bunny and the six-member Grupo Frontera performing "Un x100to" against the backdrop of a remote ranch in the desert.
• Grupo Frontera and fans alike were caught off guard by Bad Bunny's contribution to "Un x100to." The surprise addition of Benito's vocals came about when the song's co-composer, Edgar Barrera, announced his participation on the day of the norteño group's music video shoot.
  
  "We did not hear Bad Bunny's part in the song until the day of the video," Payo Solis told Apple Music's Zane Lowe. "So, when that part comes out and we were shooting the video, I froze. Having a song with Bad Bunny is just something that... It's unexplainable."
• When Rios and Edgar Barrera initially penned the song, it belonged to a different genre. It spent a year and a half on the shelf, making the rounds among various artists, but no one saw it as an R&B track. The lyrics, the melody - everything remained the same, but the arrangement was R&B. "I feel that the industry was very focused on a more urbano vibe, and the song didn't fit the rhythm it had," Barrera told Billboard.
  
  Barrera decided to give it one more shot with Grupo Frontera. Stripping it down to just the guitar and vocals, the Mexican songwriter presented the song to the group. As he strummed and sang, the magic happened. Without hesitation, they declared, "We're going to record it." Payo Solis quickly picked up the tune, and they laid down the track that very day in the studio.
  
  Right then and there, they sensed the magic. "We were trying to experiment with Frontera singing a song that wasn't the typical cumbia," recalled Barrera. "That's part of what I get to do as a producer."
  
  It was Bad Bunny who introduced dark pads, a type of electronic sound that evokes tension or suspense, for a dramatic switch-up, gradually weaving in elements of cumbia. "At that point, Mag, Bad Bunny's producer, and I sat down to work, and we came up with what is now 'Un x100to,'" said Barrera.