138.82% is the change from 255 to 609
Calculation steps:
[( 609 - 255 ) ÷ 255] x 100 = 138.82%
Formula
Percentage change = [(609 - 255) / 255] x 100
Subtract the new number by the original number
609 - 255 = 354
354 ÷ 255 = 1.388235294117647
1.388235294117647 x 100 = 138.82%