-87.48% is the change from 687 to 86
Calculation steps:
[( 86 - 687 ) ÷ 687] x 100 = -87.48%
Formula
Percentage change = [(86 - 687) / 687] x 100
Subtract the new number by the original number
86 - 687 = -601
-601 ÷ 687 = -0.8748180494905385
-0.8748180494905385 x 100 = -87.48%