-89.93% is the change from 824 to 83
Calculation steps:
[( 83 - 824 ) ÷ 824] x 100 = -89.93%
Formula
Percentage change = [(83 - 824) / 824] x 100
Subtract the new number by the original number
83 - 824 = -741
-741 ÷ 824 = -0.8992718446601942
-0.8992718446601942 x 100 = -89.93%