-89.73% is the change from 847 to 87
Calculation steps:
[( 87 - 847 ) ÷ 847] x 100 = -89.73%
Formula
Percentage change = [(87 - 847) / 847] x 100
Subtract the new number by the original number
87 - 847 = -760
-760 ÷ 847 = -0.89728453364817
-0.89728453364817 x 100 = -89.73%