12.5% is the change from 168 to 189
Calculation steps:
[( 189 - 168 ) ÷ 168] x 100 = 12.5%
Formula
Percentage change = [(189 - 168) / 168] x 100
Subtract the new number by the original number
189 - 168 = 21
21 ÷ 168 = 0.125
0.125 x 100 = 12.5%
Example