-88.74% is the change from 799 to 90
Calculation steps:
[( 90 - 799 ) ÷ 799] x 100 = -88.74%
Formula
Percentage change = [(90 - 799) / 799] x 100
Subtract the new number by the original number
90 - 799 = -709
-709 ÷ 799 = -0.8873591989987485
-0.8873591989987485 x 100 = -88.74%