Which percent change represents a percent increase? A. Original amount = 978
New amount = 118
Percent change = 87%

B. Original amount = 574
New amount = 678
Percent change = 18%

C. Original amount = 1,055
New amount = 1,000
Percent change = 5%

D. Original amount = 1,254
New amount = 1,045
Percent change = 17%

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)