12.28% is the change from 171 to 192
Calculation steps:
[( 192 - 171 ) ÷ 171] x 100 = 12.28%
Formula
Percentage change = [(192 - 171) / 171] x 100
Subtract the new number by the original number
192 - 171 = 21
21 ÷ 171 = 0.12280701754385964
0.12280701754385964 x 100 = 12.28%