309.15% is the change from 142 to 581
Calculation steps:
[( 581 - 142 ) ÷ 142] x 100 = 309.15%
Formula
Percentage change = [(581 - 142) / 142] x 100
Subtract the new number by the original number
581 - 142 = 439
439 ÷ 142 = 3.091549295774648
3.091549295774648 x 100 = 309.15%