-87.3% is the change from 685 to 87
Calculation steps:
[( 87 - 685 ) ÷ 685] x 100 = -87.3%
Formula
Percentage change = [(87 - 685) / 685] x 100
Subtract the new number by the original number
87 - 685 = -598
-598 ÷ 685 = -0.872992700729927
-0.872992700729927 x 100 = -87.3%