-97.89% is the change from 994 to 21
Calculation steps:
[( 21 - 994 ) ÷ 994] x 100 = -97.89%
Formula
Percentage change = [(21 - 994) / 994] x 100
Subtract the new number by the original number
21 - 994 = -973
-973 ÷ 994 = -0.9788732394366197
-0.9788732394366197 x 100 = -97.89%