-96.91% is the change from 810 to 25
Calculation steps:
[( 25 - 810 ) ÷ 810] x 100 = -96.91%
Formula
Percentage change = [(25 - 810) / 810] x 100
Subtract the new number by the original number
25 - 810 = -785
-785 ÷ 810 = -0.9691358024691358
-0.9691358024691358 x 100 = -96.91%