-90.65% is the change from 845 to 79
Calculation steps:
[( 79 - 845 ) ÷ 845] x 100 = -90.65%
Formula
Percentage change = [(79 - 845) / 845] x 100
Subtract the new number by the original number
79 - 845 = -766
-766 ÷ 845 = -0.906508875739645
-0.906508875739645 x 100 = -90.65%