-97.77% is the change from 940 to 21
Calculation steps:
[( 21 - 940 ) ÷ 940] x 100 = -97.77%
Formula
Percentage change = [(21 - 940) / 940] x 100
Subtract the new number by the original number
21 - 940 = -919
-919 ÷ 940 = -0.9776595744680852
-0.9776595744680852 x 100 = -97.77%