30.88% is the change from 68 to 89
Calculation steps:
[( 89 - 68 ) ÷ 68] x 100 = 30.88%
Formula
Percentage change = [(89 - 68) / 68] x 100
Subtract the new number by the original number
89 - 68 = 21
21 ÷ 68 = 0.3088235294117647
0.3088235294117647 x 100 = 30.88%