-58.13% is the change from 812 to 340
Calculation steps:
[( 340 - 812 ) ÷ 812] x 100 = -58.13%
Formula
Percentage change = [(340 - 812) / 812] x 100
Subtract the new number by the original number
340 - 812 = -472
-472 ÷ 812 = -0.5812807881773399
-0.5812807881773399 x 100 = -58.13%