72% is the change from 100 to 172
Calculation steps:
[( 172 - 100 ) ÷ 100] x 100 = 72%
Formula
Percentage change = [(172 - 100) / 100] x 100
Subtract the new number by the original number
172 - 100 = 72
72 ÷ 100 = 0.72
0.72 x 100 = 72%
Example