339.13% is the change from 115 to 505
Calculation steps:
[( 505 - 115 ) ÷ 115] x 100 = 339.13%
Formula
Percentage change = [(505 - 115) / 115] x 100
Subtract the new number by the original number
505 - 115 = 390
390 ÷ 115 = 3.391304347826087
3.391304347826087 x 100 = 339.13%