There are several artists using this name:
1) 100% is artist Benji Santos, they also released music under the name Whatever, Dad and Aro.

2) 100% is an Eurodance project from Germany. It was created and produced by Ramin Naghachian, and Rachid Nouri. 100% released the single "Power Of Light" in 1994 featuring Melanie Thornton and Michael Romeo.

3) 100% is also an alternative rock / punk band from Czech Republic. They started in London, UK in 1996 with four members, of which only the bassist/singer Marco Frangos and the drummer John Hire remained after some time. Later Marco decided to stay in the Czech Republic and he keeps playing there with a new drummer, Petr Mori. Their current official site is at http://www.myspace.com/onehundredpc.

4) 100% is a mysterious New York-based artist

5) 100% (Hangul: 백퍼센트) was a 7-member South Korean boy group that debuted in September 2012 under Andy Lee's company T.O.P Media with their first single album We, 100%. They made their first comeback on the 7th of December with the digital single, Guy Like Me. They disbanded in October 2021.
100% consisted of members: Seo Minwoo, Kim Rokhyun, Jo Jonghwan, Kim Chanyong, and Jang Hyukjin. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.