100%

100% is the name of a television game show which ran from the day after the inception of its host television channel, Channel 5 (31 March 1997, now more correctly known as Five) until July 2001. In its original format, the three players of the game would take three seconds or less to push buttons on the set which corresponded to the multiple-choice answers of 100 general knowledge questions.

The original twist to the show was the fact that throughout the whole game, the players were told the individual scores (as a percentage of the number of questions answered correctly), but not the player to whom those scores belonged. The scores were told to the contestants after ten questions, thirty questions, fifty questions, sixty questions, eighty questions, and all one hundred questions had been asked, in terms of a percentage of the number of questions they had correctly answered. Later on the rules were changed, so that the players now knew who had which scores for the first 50 questions.

Originally, the format of the show was that 100 questions would be asked without an overall subject. In its later format, the subject would change every ten questions with questions 1 to 20 and 81 to 100 being all general knowledge questions.

The program was often billed as "The game show without a host". The "host" was, in actual fact, former London newsreader Robin Houston, who read the questions from somewhere off-screen throughout the show and, as a presenter, was never seen by the viewers.

Statistically, the most notable contestants from the show were David Webb (who, as a winner of some thirty consecutive shows in the early days of the program, was revered by contestants and host alike, and was perhaps most accurately characterized by his enthusiastic restating "Yes, I will" after the end of each victory when asked if he wished to come back onto the next show), and Ian Lygo, most recently made famous (because of his record-breaking unbeaten seventy-five game streak on the show) from the amount of interest drawn from Ken Jennings' recent winning streak (which fell short by a game) on the American game show Jeopardy!. Lygo also holds the record for the highest non-special winning percentage score.

Five then brought the show to the United States in 1999 under its Pearson Television banner, with American Top 40 radio personality Casey Kasem in the presenter's helm. The show did not last a full season.