-88.72% is the change from 798 to 90
Calculation steps:
[( 90 - 798 ) ÷ 798] x 100 = -88.72%
Formula
Percentage change = [(90 - 798) / 798] x 100
Subtract the new number by the original number
90 - 798 = -708
-708 ÷ 798 = -0.8872180451127819
-0.8872180451127819 x 100 = -88.72%