18.18% is the change from 77 to 91
Calculation steps:
[( 91 - 77 ) ÷ 77] x 100 = 18.18%
Formula
Percentage change = [(91 - 77) / 77] x 100
Subtract the new number by the original number
91 - 77 = 14
14 ÷ 77 = 0.18181818181818182
0.18181818181818182 x 100 = 18.18%