18.6% is the change from 172 to 204
Calculation steps:
[( 204 - 172 ) ÷ 172] x 100 = 18.6%
Formula
Percentage change = [(204 - 172) / 172] x 100
Subtract the new number by the original number
204 - 172 = 32
32 ÷ 172 = 0.18604651162790697
0.18604651162790697 x 100 = 18.6%