a/one hundred percent

a/one hundred percent

Absolutely or completely; all the way. I'm one hundred percent certain this is the best course of action. I agree with their decision a hundred percent.
See also: hundred, one, percent
Farlex Dictionary of Idioms.

a/one hundred per ˈcent

completely: I agree with you one hundred per cent.
See also: cent, hundred, one, per
Farlex Partner Idioms Dictionary
See also:
  • a/one hundred per cent
  • 100
  • a hundred
  • million
  • hundred
  • thousand
  • hundo
  • anything of the kind
  • at the most
  • it's a hundred, etc. to one that somebody/something will do something