-59.88% is the change from 820 to 329
Calculation steps:
[( 329 - 820 ) ÷ 820] x 100 = -59.88%
Formula
Percentage change = [(329 - 820) / 820] x 100
Subtract the new number by the original number
329 - 820 = -491
-491 ÷ 820 = -0.598780487804878
-0.598780487804878 x 100 = -59.88%