20.31% is the change from 192 to 231
Calculation steps:
[( 231 - 192 ) ÷ 192] x 100 = 20.31%
Formula
Percentage change = [(231 - 192) / 192] x 100
Subtract the new number by the original number
231 - 192 = 39
39 ÷ 192 = 0.203125
0.203125 x 100 = 20.31%