-15.12% is the change from 635 to 539
Calculation steps:
[( 539 - 635 ) ÷ 635] x 100 = -15.12%
Formula
Percentage change = [(539 - 635) / 635] x 100
Subtract the new number by the original number
539 - 635 = -96
-96 ÷ 635 = -0.15118110236220472
-0.15118110236220472 x 100 = -15.12%