20% is the change from 140 to 168
Calculation steps:
[( 168 - 140 ) ÷ 140] x 100 = 20%
Formula
Percentage change = [(168 - 140) / 140] x 100
Subtract the new number by the original number
168 - 140 = 28
28 ÷ 140 = 0.2
0.2 x 100 = 20%
Example