-49.41% is the change from 338 to 171
Calculation steps:
[( 171 - 338 ) ÷ 338] x 100 = -49.41%
Formula
Percentage change = [(171 - 338) / 338] x 100
Subtract the new number by the original number
171 - 338 = -167
-167 ÷ 338 = -0.4940828402366864
-0.4940828402366864 x 100 = -49.41%