-13.82% is the change from 615 to 530
Calculation steps:
[( 530 - 615 ) ÷ 615] x 100 = -13.82%
Formula
Percentage change = [(530 - 615) / 615] x 100
Subtract the new number by the original number
530 - 615 = -85
-85 ÷ 615 = -0.13821138211382114
-0.13821138211382114 x 100 = -13.82%