-60.49% is the change from 820 to 324
Calculation steps:
[( 324 - 820 ) ÷ 820] x 100 = -60.49%
Formula
Percentage change = [(324 - 820) / 820] x 100
Subtract the new number by the original number
324 - 820 = -496
-496 ÷ 820 = -0.6048780487804878
-0.6048780487804878 x 100 = -60.49%