The phrase "a decrease in the percentage of" is correct and usable in written English.
It can be used when discussing statistical changes or trends, particularly in contexts involving data analysis or reporting.
Example: "There was a significant decrease in the percentage of students passing the exam this year compared to last year."
Alternatives: "a reduction in the proportion of" or "a decline in the rate of".
About 3percentt of the 2,800 current troopers are women, Mr. Dunbar said, so the new class actually represents a decrease in the percentage of women.
The latter two provisions of the law have actually seen a decrease in the percentage of people who knew these policies were in the bill, since it first passed.
South Africa said it increased the number of arrests of poachers from 267 in 2012, to 343 in 2013, though the number represents a decrease in the percentage of rhinos killed in total.
As a result, the major trends in American diets since the late 70's, according to the U.S.D.A. agricultural economist Judith Putnam, have been a decrease in the percentage of fat calories and a "greatly increased consumption of carbohydrates".
Lens epithelium in PAR39 transgenic mice demonstrated a decrease in the percentage of BrdU/DAPI staining within the GZ as compared to nontransgenic littermate controls (8.1% vs. 10.9%).
All 3 participants demonstrated a decrease in the percentage of problem behavior following the implementation of treatment which remained at near zero during a 3-month follow-up.
Temperature was the most important factor affecting development of both species causing faster progression through developmental stages as well as a decrease in the percentage of normal development.
A decrease in the percentage of spontaneous deliveries has been reported, but the rate of cesarean section (c-section) in this population has never been studied.
When compared with a 1.0 N free acid solution, both solutions showed a decrease in the percentage of interstitial sites (interstices between the metal atoms).
When the stratum radiatum (SR) was stimulated in slices from injured mice, we found decreased depolarization in SR and increased hyperpolarization in stratum oriens (SO), together with a decrease in the percentage of pyramidal neurons firing stimulus-evoked action potentials.
In addition, we found a decrease in the percentage of FoxP3 cells both in the skin of MF patients, when compared with control skin samples, and with disease progression.
