-96.78% is the change from 652 to 21
Calculation steps:
[( 21 - 652 ) ÷ 652] x 100 = -96.78%
Formula
Percentage change = [(21 - 652) / 652] x 100
Subtract the new number by the original number
21 - 652 = -631
-631 ÷ 652 = -0.9677914110429447
-0.9677914110429447 x 100 = -96.78%