257.55% is the change from 139 to 497
Calculation steps:
[( 497 - 139 ) ÷ 139] x 100 = 257.55%
Formula
Percentage change = [(497 - 139) / 139] x 100
Subtract the new number by the original number
497 - 139 = 358
358 ÷ 139 = 2.5755395683453237
2.5755395683453237 x 100 = 257.55%