-97.87% is the change from 985 to 21
Calculation steps:
[( 21 - 985 ) ÷ 985] x 100 = -97.87%
Formula
Percentage change = [(21 - 985) / 985] x 100
Subtract the new number by the original number
21 - 985 = -964
-964 ÷ 985 = -0.9786802030456853
-0.9786802030456853 x 100 = -97.87%