In your sentence, "North Central Region" is correctly capitalized as it refers to a specific geographical area. However, "percent" should be written as "percent" in lowercase, unless it starts a sentence. The sentence is mostly correct, but ensure clarity by checking context and style guidelines you may be following.
The percent that 35 is increased from 25 is (35 - 25) / 25 * 100, or 40 percent.
"...increased by four percent" is a fragment because it lacks a subject. WHAT increased by four percent?
95 increased by 90 percent = 180.5
2.81 increased by 5 percent = 2.9505
50 increased by 50 percent = 75
The percent that 35 is increased from 25 is (35 - 25) / 25 * 100, or 40 percent.
"...increased by four percent" is a fragment because it lacks a subject. WHAT increased by four percent?
66 increased by 88 percent = 124.1
95 increased by 90 percent = 180.5
22,500 increased by 4 percent = 23,400
3000 increased by 6 percent = 3,180
2.81 increased by 5 percent = 2.9505
2 increased by 50 percent = 3
44 increased by 6 percent = 46.64
26 increased by 5 percent = 27.3
6,000 increased by 8 percent = 6,480
70 increased by 6 percent = 74.2