-90.37% is the change from 810 to 78
Calculation steps:
[( 78 - 810 ) ÷ 810] x 100 = -90.37%
Formula
Percentage change = [(78 - 810) / 810] x 100
Subtract the new number by the original number
78 - 810 = -732
-732 ÷ 810 = -0.9037037037037037
-0.9037037037037037 x 100 = -90.37%