255.48% is the change from 155 to 551
Calculation steps:
[( 551 - 155 ) ÷ 155] x 100 = 255.48%
Formula
Percentage change = [(551 - 155) / 155] x 100
Subtract the new number by the original number
551 - 155 = 396
396 ÷ 155 = 2.554838709677419
2.554838709677419 x 100 = 255.48%