-60.41% is the change from 831 to 329
Calculation steps:
[( 329 - 831 ) ÷ 831] x 100 = -60.41%
Formula
Percentage change = [(329 - 831) / 831] x 100
Subtract the new number by the original number
329 - 831 = -502
-502 ÷ 831 = -0.6040914560770156
-0.6040914560770156 x 100 = -60.41%