-96.95% is the change from 820 to 25
Calculation steps:
[( 25 - 820 ) ÷ 820] x 100 = -96.95%
Formula
Percentage change = [(25 - 820) / 820] x 100
Subtract the new number by the original number
25 - 820 = -795
-795 ÷ 820 = -0.9695121951219512
-0.9695121951219512 x 100 = -96.95%