123.08% is the change from 260 to 580
Calculation steps:
[( 580 - 260 ) ÷ 260] x 100 = 123.08%
Formula
Percentage change = [(580 - 260) / 260] x 100
Subtract the new number by the original number
580 - 260 = 320
320 ÷ 260 = 1.2307692307692308
1.2307692307692308 x 100 = 123.08%