128.57% is the change from 140 to 320
Calculation steps:
[( 320 - 140 ) ÷ 140] x 100 = 128.57%
Formula
Percentage change = [(320 - 140) / 140] x 100
Subtract the new number by the original number
320 - 140 = 180
180 ÷ 140 = 1.2857142857142858
1.2857142857142858 x 100 = 128.57%