-87.58% is the change from 805 to 100
Calculation steps:
[( 100 - 805 ) ÷ 805] x 100 = -87.58%
Formula
Percentage change = [(100 - 805) / 805] x 100
Subtract the new number by the original number
100 - 805 = -705
-705 ÷ 805 = -0.8757763975155279
-0.8757763975155279 x 100 = -87.58%