-83.94% is the change from 635 to 102
Calculation steps:
[( 102 - 635 ) ÷ 635] x 100 = -83.94%
Formula
Percentage change = [(102 - 635) / 635] x 100
Subtract the new number by the original number
102 - 635 = -533
-533 ÷ 635 = -0.8393700787401575
-0.8393700787401575 x 100 = -83.94%