-15.28% is the change from 635 to 538
Calculation steps:
[( 538 - 635 ) ÷ 635] x 100 = -15.28%
Formula
Percentage change = [(538 - 635) / 635] x 100
Subtract the new number by the original number
538 - 635 = -97
-97 ÷ 635 = -0.15275590551181104
-0.15275590551181104 x 100 = -15.28%