33.82% is the change from 68 to 91
Calculation steps:
[( 91 - 68 ) ÷ 68] x 100 = 33.82%
Formula
Percentage change = [(91 - 68) / 68] x 100
Subtract the new number by the original number
91 - 68 = 23
23 ÷ 68 = 0.3382352941176471
0.3382352941176471 x 100 = 33.82%