67.54% is the change from 191 to 320
Calculation steps:
[( 320 - 191 ) ÷ 191] x 100 = 67.54%
Formula
Percentage change = [(320 - 191) / 191] x 100
Subtract the new number by the original number
320 - 191 = 129
129 ÷ 191 = 0.675392670157068
0.675392670157068 x 100 = 67.54%