-97.52% is the change from 848 to 21
Calculation steps:
[( 21 - 848 ) ÷ 848] x 100 = -97.52%
Formula
Percentage change = [(21 - 848) / 848] x 100
Subtract the new number by the original number
21 - 848 = -827
-827 ÷ 848 = -0.9752358490566038
-0.9752358490566038 x 100 = -97.52%