-97.68% is the change from 905 to 21
Calculation steps:
[( 21 - 905 ) ÷ 905] x 100 = -97.68%
Formula
Percentage change = [(21 - 905) / 905] x 100
Subtract the new number by the original number
21 - 905 = -884
-884 ÷ 905 = -0.9767955801104973
-0.9767955801104973 x 100 = -97.68%