295.31% is the change from 128 to 506
Calculation steps:
[( 506 - 128 ) ÷ 128] x 100 = 295.31%
Formula
Percentage change = [(506 - 128) / 128] x 100
Subtract the new number by the original number
506 - 128 = 378
378 ÷ 128 = 2.953125
2.953125 x 100 = 295.31%