-98.86% is the change from 790 to 9
Calculation steps:
[( 9 - 790 ) ÷ 790] x 100 = -98.86%
Formula
Percentage change = [(9 - 790) / 790] x 100
Subtract the new number by the original number
9 - 790 = -781
-781 ÷ 790 = -0.9886075949367089
-0.9886075949367089 x 100 = -98.86%