296.88% is the change from 128 to 508
Calculation steps:
[( 508 - 128 ) ÷ 128] x 100 = 296.88%
Formula
Percentage change = [(508 - 128) / 128] x 100
Subtract the new number by the original number
508 - 128 = 380
380 ÷ 128 = 2.96875
2.96875 x 100 = 296.88%