-59.93% is the change from 821 to 329
Calculation steps:
[( 329 - 821 ) ÷ 821] x 100 = -59.93%
Formula
Percentage change = [(329 - 821) / 821] x 100
Subtract the new number by the original number
329 - 821 = -492
-492 ÷ 821 = -0.5992691839220463
-0.5992691839220463 x 100 = -59.93%