-90.34% is the change from 818 to 79
Calculation steps:
[( 79 - 818 ) ÷ 818] x 100 = -90.34%
Formula
Percentage change = [(79 - 818) / 818] x 100
Subtract the new number by the original number
79 - 818 = -739
-739 ÷ 818 = -0.9034229828850856
-0.9034229828850856 x 100 = -90.34%