-56.72% is the change from 580 to 251
Calculation steps:
[( 251 - 580 ) ÷ 580] x 100 = -56.72%
Formula
Percentage change = [(251 - 580) / 580] x 100
Subtract the new number by the original number
251 - 580 = -329
-329 ÷ 580 = -0.5672413793103448
-0.5672413793103448 x 100 = -56.72%