-87.48% is the change from 799 to 100
Calculation steps:
[( 100 - 799 ) ÷ 799] x 100 = -87.48%
Formula
Percentage change = [(100 - 799) / 799] x 100
Subtract the new number by the original number
100 - 799 = -699
-699 ÷ 799 = -0.8748435544430538
-0.8748435544430538 x 100 = -87.48%