-98.05% is the change from 821 to 16
Calculation steps:
[( 16 - 821 ) ÷ 821] x 100 = -98.05%
Formula
Percentage change = [(16 - 821) / 821] x 100
Subtract the new number by the original number
16 - 821 = -805
-805 ÷ 821 = -0.9805115712545676
-0.9805115712545676 x 100 = -98.05%