-60.42% is the change from 816 to 323
Calculation steps:
[( 323 - 816 ) ÷ 816] x 100 = -60.42%
Formula
Percentage change = [(323 - 816) / 816] x 100
Subtract the new number by the original number
323 - 816 = -493
-493 ÷ 816 = -0.6041666666666666
-0.6041666666666666 x 100 = -60.42%