-39.58% is the change from 816 to 493
Calculation steps:
[( 493 - 816 ) ÷ 816] x 100 = -39.58%
Formula
Percentage change = [(493 - 816) / 816] x 100
Subtract the new number by the original number
493 - 816 = -323
-323 ÷ 816 = -0.3958333333333333
-0.3958333333333333 x 100 = -39.58%