-87.99% is the change from 691 to 83
Calculation steps:
[( 83 - 691 ) ÷ 691] x 100 = -87.99%
Formula
Percentage change = [(83 - 691) / 691] x 100
Subtract the new number by the original number
83 - 691 = -608
-608 ÷ 691 = -0.8798842257597684
-0.8798842257597684 x 100 = -87.99%