percent decrease Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a reduction expressed as a fraction of one hundred. Example Sentence The report showed a fifteen percent decrease in sales compared to last year. More Example Sentences The percent decrease was larger than expected. Synonyms reduction; decline; drop Antonyms increase; rise; gain Hear It! Say It! Write It! percent decrease Switch to cursive Start Share with your friends: