-57.39% is the change from 399 to 170
Calculation steps:
[( 170 - 399 ) ÷ 399] x 100 = -57.39%
Formula
Percentage change = [(170 - 399) / 399] x 100
Subtract the new number by the original number
170 - 399 = -229
-229 ÷ 399 = -0.5739348370927319
-0.5739348370927319 x 100 = -57.39%