-52.07% is the change from 580 to 278
Calculation steps:
[( 278 - 580 ) ÷ 580] x 100 = -52.07%
Formula
Percentage change = [(278 - 580) / 580] x 100
Subtract the new number by the original number
278 - 580 = -302
-302 ÷ 580 = -0.5206896551724138
-0.5206896551724138 x 100 = -52.07%