-17.79% is the change from 208 to 171
Calculation steps:
[( 171 - 208 ) ÷ 208] x 100 = -17.79%
Formula
Percentage change = [(171 - 208) / 208] x 100
Subtract the new number by the original number
171 - 208 = -37
-37 ÷ 208 = -0.1778846153846154
-0.1778846153846154 x 100 = -17.79%