-57.2% is the change from 806 to 345
Calculation steps:
[( 345 - 806 ) ÷ 806] x 100 = -57.2%
Formula
Percentage change = [(345 - 806) / 806] x 100
Subtract the new number by the original number
345 - 806 = -461
-461 ÷ 806 = -0.5719602977667494
-0.5719602977667494 x 100 = -57.2%