percent

/pərˈsɛnt/
noun
  1. One part in a hundred; a proportion or rate out of 100.
    • The store is offering a 20 percent discount on all shoes.
    • About 75 percent of the Earth's surface is covered by water.
    • Only 10 percent of the students failed the test.
adjective
  1. Amounting to a specified number in every hundred.
    • We need a one hundred percent effort from everyone.
    • She received a five percent raise at work.
    • The interest rate is three percent per year.
adverb
  1. In every hundred; by the hundred.
    • Sales increased by fifteen percent this quarter.
    • The population grew by two percent last year.
    • The recipe calls for a reduction of ten percent in sugar.