The phrase "percent accuracy" refers to how close a measurement or estimation is to the true or correct value, expressed as a percentage. It measures the level of correctness or precision in a numerical result. Full definition
Standard blood tests for gluten sensitivity have a less than 30 percent accuracy rate. (susancnt.com)
In pilot studies, the procedure diagnosed allergies with 95 percent accuracy in both children and adults, a rate similar to that of food - challenge tests. (scientificamerican.com)
As a result of years of study, he can predict with 90 percent accuracy whether a couple will stay married or divorce. (edition.cnn.com)