-97.89% is the change from 996 to 21
Calculation steps:
[( 21 - 996 ) ÷ 996] x 100 = -97.89%
Formula
Percentage change = [(21 - 996) / 996] x 100
Subtract the new number by the original number
21 - 996 = -975
-975 ÷ 996 = -0.9789156626506024
-0.9789156626506024 x 100 = -97.89%