-97.81% is the change from 960 to 21
Calculation steps:
[( 21 - 960 ) ÷ 960] x 100 = -97.81%
Formula
Percentage change = [(21 - 960) / 960] x 100
Subtract the new number by the original number
21 - 960 = -939
-939 ÷ 960 = -0.978125
-0.978125 x 100 = -97.81%