-40.69% is the change from 580 to 344
Calculation steps:
[( 344 - 580 ) ÷ 580] x 100 = -40.69%
Formula
Percentage change = [(344 - 580) / 580] x 100
Subtract the new number by the original number
344 - 580 = -236
-236 ÷ 580 = -0.4068965517241379
-0.4068965517241379 x 100 = -40.69%