-87.09% is the change from 821 to 106
Calculation steps:
[( 106 - 821 ) ÷ 821] x 100 = -87.09%
Formula
Percentage change = [(106 - 821) / 821] x 100
Subtract the new number by the original number
106 - 821 = -715
-715 ÷ 821 = -0.8708891595615104
-0.8708891595615104 x 100 = -87.09%