-60.54% is the change from 821 to 324
Calculation steps:
[( 324 - 821 ) ÷ 821] x 100 = -60.54%
Formula
Percentage change = [(324 - 821) / 821] x 100
Subtract the new number by the original number
324 - 821 = -497
-497 ÷ 821 = -0.6053593179049939
-0.6053593179049939 x 100 = -60.54%