-96.38% is the change from 635 to 23
Calculation steps:
[( 23 - 635 ) ÷ 635] x 100 = -96.38%
Formula
Percentage change = [(23 - 635) / 635] x 100
Subtract the new number by the original number
23 - 635 = -612
-612 ÷ 635 = -0.9637795275590552
-0.9637795275590552 x 100 = -96.38%