-89.7% is the change from 845 to 87
Calculation steps:
[( 87 - 845 ) ÷ 845] x 100 = -89.7%
Formula
Percentage change = [(87 - 845) / 845] x 100
Subtract the new number by the original number
87 - 845 = -758
-758 ÷ 845 = -0.8970414201183432
-0.8970414201183432 x 100 = -89.7%