65% is the change from 140 to 231
Calculation steps:
[( 231 - 140 ) ÷ 140] x 100 = 65%
Formula
Percentage change = [(231 - 140) / 140] x 100
Subtract the new number by the original number
231 - 140 = 91
91 ÷ 140 = 0.65
0.65 x 100 = 65%
Example