-81.74% is the change from 816 to 149
Calculation steps:
[( 149 - 816 ) ÷ 816] x 100 = -81.74%
Formula
Percentage change = [(149 - 816) / 816] x 100
Subtract the new number by the original number
149 - 816 = -667
-667 ÷ 816 = -0.8174019607843137
-0.8174019607843137 x 100 = -81.74%