-73.91% is the change from 824 to 215
Calculation steps:
[( 215 - 824 ) ÷ 824] x 100 = -73.91%
Formula
Percentage change = [(215 - 824) / 824] x 100
Subtract the new number by the original number
215 - 824 = -609
-609 ÷ 824 = -0.7390776699029126
-0.7390776699029126 x 100 = -73.91%