The phrase "percent decrease" means a reduction or decrease in a quantity or value expressed as a percentage. It indicates how much something has gone down or become smaller compared to its original value. Full definition
Positive emotion reflected in the narrative notes was associated with a 30 percent decrease in risk for suicide in analytical models, the authors report. (sciencedaily.com)
This is almost a 50 percent decrease from last year's results. (medreps.com)
And with coffee, researchers found just one cup per day was also associated with about a 20 percent decreased risk of stroke during a 13 - year follow - up period. (npr.org)