40% is the change from 580 to 812
Calculation steps:
[( 812 - 580 ) ÷ 580] x 100 = 40%
Formula
Percentage change = [(812 - 580) / 580] x 100
Subtract the new number by the original number
812 - 580 = 232
232 ÷ 580 = 0.4
0.4 x 100 = 40%
Example