-97.81% is the change from 961 to 21
Calculation steps:
[( 21 - 961 ) ÷ 961] x 100 = -97.81%
Formula
Percentage change = [(21 - 961) / 961] x 100
Subtract the new number by the original number
21 - 961 = -940
-940 ÷ 961 = -0.9781477627471384
-0.9781477627471384 x 100 = -97.81%