-58.12% is the change from 819 to 343
Calculation steps:
[( 343 - 819 ) ÷ 819] x 100 = -58.12%
Formula
Percentage change = [(343 - 819) / 819] x 100
Subtract the new number by the original number
343 - 819 = -476
-476 ÷ 819 = -0.5811965811965812
-0.5811965811965812 x 100 = -58.12%