9.3% is the change from 172 to 188
Calculation steps:
[( 188 - 172 ) ÷ 172] x 100 = 9.3%
Formula
Percentage change = [(188 - 172) / 172] x 100
Subtract the new number by the original number
188 - 172 = 16
16 ÷ 172 = 0.09302325581395349
0.09302325581395349 x 100 = 9.3%