-97.82% is the change from 964 to 21
Calculation steps:
[( 21 - 964 ) ÷ 964] x 100 = -97.82%
Formula
Percentage change = [(21 - 964) / 964] x 100
Subtract the new number by the original number
21 - 964 = -943
-943 ÷ 964 = -0.9782157676348547
-0.9782157676348547 x 100 = -97.82%