-97.81% is the change from 957 to 21
Calculation steps:
[( 21 - 957 ) ÷ 957] x 100 = -97.81%
Formula
Percentage change = [(21 - 957) / 957] x 100
Subtract the new number by the original number
21 - 957 = -936
-936 ÷ 957 = -0.9780564263322884
-0.9780564263322884 x 100 = -97.81%