-82.95% is the change from 821 to 140
Calculation steps:
[( 140 - 821 ) ÷ 821] x 100 = -82.95%
Formula
Percentage change = [(140 - 821) / 821] x 100
Subtract the new number by the original number
140 - 821 = -681
-681 ÷ 821 = -0.8294762484774665
-0.8294762484774665 x 100 = -82.95%