-39.38% is the change from 843 to 511
Calculation steps:
[( 511 - 843 ) ÷ 843] x 100 = -39.38%
Formula
Percentage change = [(511 - 843) / 843] x 100
Subtract the new number by the original number
511 - 843 = -332
-332 ÷ 843 = -0.39383155397390274
-0.39383155397390274 x 100 = -39.38%