-86.97% is the change from 821 to 107
Calculation steps:
[( 107 - 821 ) ÷ 821] x 100 = -86.97%
Formula
Percentage change = [(107 - 821) / 821] x 100
Subtract the new number by the original number
107 - 821 = -714
-714 ÷ 821 = -0.8696711327649208
-0.8696711327649208 x 100 = -86.97%