-85.59% is the change from 687 to 99
Calculation steps:
[( 99 - 687 ) ÷ 687] x 100 = -85.59%
Formula
Percentage change = [(99 - 687) / 687] x 100
Subtract the new number by the original number
99 - 687 = -588
-588 ÷ 687 = -0.8558951965065502
-0.8558951965065502 x 100 = -85.59%