-99.63% is the change from 816 to 3
Calculation steps:
[( 3 - 816 ) ÷ 816] x 100 = -99.63%
Formula
Percentage change = [(3 - 816) / 816] x 100
Subtract the new number by the original number
3 - 816 = -813
-813 ÷ 816 = -0.9963235294117647
-0.9963235294117647 x 100 = -99.63%