-61.28% is the change from 829 to 321
Calculation steps:
[( 321 - 829 ) ÷ 829] x 100 = -61.28%
Formula
Percentage change = [(321 - 829) / 829] x 100
Subtract the new number by the original number
321 - 829 = -508
-508 ÷ 829 = -0.6127864897466827
-0.6127864897466827 x 100 = -61.28%