-16.5% is the change from 206 to 172
Calculation steps:
[( 172 - 206 ) ÷ 206] x 100 = -16.5%
Formula
Percentage change = [(172 - 206) / 206] x 100
Subtract the new number by the original number
172 - 206 = -34
-34 ÷ 206 = -0.1650485436893204
-0.1650485436893204 x 100 = -16.5%