162.75% is the change from 255 to 670
Calculation steps:
[( 670 - 255 ) ÷ 255] x 100 = 162.75%
Formula
Percentage change = [(670 - 255) / 255] x 100
Subtract the new number by the original number
670 - 255 = 415
415 ÷ 255 = 1.6274509803921569
1.6274509803921569 x 100 = 162.75%