-39.83% is the change from 816 to 491
Calculation steps:
[( 491 - 816 ) ÷ 816] x 100 = -39.83%
Formula
Percentage change = [(491 - 816) / 816] x 100
Subtract the new number by the original number
491 - 816 = -325
-325 ÷ 816 = -0.39828431372549017
-0.39828431372549017 x 100 = -39.83%