-96.57% is the change from 816 to 28
Calculation steps:
[( 28 - 816 ) ÷ 816] x 100 = -96.57%
Formula
Percentage change = [(28 - 816) / 816] x 100
Subtract the new number by the original number
28 - 816 = -788
-788 ÷ 816 = -0.9656862745098039
-0.9656862745098039 x 100 = -96.57%