-96.39% is the change from 637 to 23
Calculation steps:
[( 23 - 637 ) ÷ 637] x 100 = -96.39%
Formula
Percentage change = [(23 - 637) / 637] x 100
Subtract the new number by the original number
23 - 637 = -614
-614 ÷ 637 = -0.9638932496075353
-0.9638932496075353 x 100 = -96.39%