19.77% is the change from 172 to 206
Calculation steps:
[( 206 - 172 ) ÷ 172] x 100 = 19.77%
Formula
Percentage change = [(206 - 172) / 172] x 100
Subtract the new number by the original number
206 - 172 = 34
34 ÷ 172 = 0.19767441860465115
0.19767441860465115 x 100 = 19.77%