-61.04% is the change from 824 to 321
Calculation steps:
[( 321 - 824 ) ÷ 824] x 100 = -61.04%
Formula
Percentage change = [(321 - 824) / 824] x 100
Subtract the new number by the original number
321 - 824 = -503
-503 ÷ 824 = -0.6104368932038835
-0.6104368932038835 x 100 = -61.04%