-93.95% is the change from 843 to 51
Calculation steps:
[( 51 - 843 ) ÷ 843] x 100 = -93.95%
Formula
Percentage change = [(51 - 843) / 843] x 100
Subtract the new number by the original number
51 - 843 = -792
-792 ÷ 843 = -0.9395017793594306
-0.9395017793594306 x 100 = -93.95%