257.14% is the change from 140 to 500
Calculation steps:
[( 500 - 140 ) ÷ 140] x 100 = 257.14%
Formula
Percentage change = [(500 - 140) / 140] x 100
Subtract the new number by the original number
500 - 140 = 360
360 ÷ 140 = 2.5714285714285716
2.5714285714285716 x 100 = 257.14%