-57.76% is the change from 812 to 343
Calculation steps:
[( 343 - 812 ) ÷ 812] x 100 = -57.76%
Formula
Percentage change = [(343 - 812) / 812] x 100
Subtract the new number by the original number
343 - 812 = -469
-469 ÷ 812 = -0.5775862068965517
-0.5775862068965517 x 100 = -57.76%