288.55% is the change from 131 to 509
Calculation steps:
[( 509 - 131 ) ÷ 131] x 100 = 288.55%
Formula
Percentage change = [(509 - 131) / 131] x 100
Subtract the new number by the original number
509 - 131 = 378
378 ÷ 131 = 2.885496183206107
2.885496183206107 x 100 = 288.55%