-97.87% is the change from 984 to 21
Calculation steps:
[( 21 - 984 ) ÷ 984] x 100 = -97.87%
Formula
Percentage change = [(21 - 984) / 984] x 100
Subtract the new number by the original number
21 - 984 = -963
-963 ÷ 984 = -0.9786585365853658
-0.9786585365853658 x 100 = -97.87%