-81.13% is the change from 816 to 154
Calculation steps:
[( 154 - 816 ) ÷ 816] x 100 = -81.13%
Formula
Percentage change = [(154 - 816) / 816] x 100
Subtract the new number by the original number
154 - 816 = -662
-662 ÷ 816 = -0.8112745098039216
-0.8112745098039216 x 100 = -81.13%