40.66% is the change from 91 to 128
Calculation steps:
[( 128 - 91 ) ÷ 91] x 100 = 40.66%
Formula
Percentage change = [(128 - 91) / 91] x 100
Subtract the new number by the original number
128 - 91 = 37
37 ÷ 91 = 0.4065934065934066
0.4065934065934066 x 100 = 40.66%