288.37% is the change from 129 to 501
Calculation steps:
[( 501 - 129 ) ÷ 129] x 100 = 288.37%
Formula
Percentage change = [(501 - 129) / 129] x 100
Subtract the new number by the original number
501 - 129 = 372
372 ÷ 129 = 2.883720930232558
2.883720930232558 x 100 = 288.37%