-81.49% is the change from 821 to 152
Calculation steps:
[( 152 - 821 ) ÷ 821] x 100 = -81.49%
Formula
Percentage change = [(152 - 821) / 821] x 100
Subtract the new number by the original number
152 - 821 = -669
-669 ÷ 821 = -0.8148599269183922
-0.8148599269183922 x 100 = -81.49%