-57.04% is the change from 398 to 171
Calculation steps:
[( 171 - 398 ) ÷ 398] x 100 = -57.04%
Formula
Percentage change = [(171 - 398) / 398] x 100
Subtract the new number by the original number
171 - 398 = -227
-227 ÷ 398 = -0.5703517587939698
-0.5703517587939698 x 100 = -57.04%