-20.47% is the change from 816 to 649
Calculation steps:
[( 649 - 816 ) ÷ 816] x 100 = -20.47%
Formula
Percentage change = [(649 - 816) / 816] x 100
Subtract the new number by the original number
649 - 816 = -167
-167 ÷ 816 = -0.20465686274509803
-0.20465686274509803 x 100 = -20.47%