302.34% is the change from 128 to 515
Calculation steps:
[( 515 - 128 ) ÷ 128] x 100 = 302.34%
Formula
Percentage change = [(515 - 128) / 128] x 100
Subtract the new number by the original number
515 - 128 = 387
387 ÷ 128 = 3.0234375
3.0234375 x 100 = 302.34%