-97.73% is the change from 927 to 21
Calculation steps:
[( 21 - 927 ) ÷ 927] x 100 = -97.73%
Formula
Percentage change = [(21 - 927) / 927] x 100
Subtract the new number by the original number
21 - 927 = -906
-906 ÷ 927 = -0.9773462783171522
-0.9773462783171522 x 100 = -97.73%