-89.99% is the change from 869 to 87
Calculation steps:
[( 87 - 869 ) ÷ 869] x 100 = -89.99%
Formula
Percentage change = [(87 - 869) / 869] x 100
Subtract the new number by the original number
87 - 869 = -782
-782 ÷ 869 = -0.8998849252013809
-0.8998849252013809 x 100 = -89.99%