-87.81% is the change from 689 to 84
Calculation steps:
[( 84 - 689 ) ÷ 689] x 100 = -87.81%
Formula
Percentage change = [(84 - 689) / 689] x 100
Subtract the new number by the original number
84 - 689 = -605
-605 ÷ 689 = -0.8780841799709724
-0.8780841799709724 x 100 = -87.81%