-28.57% is the change from 238 to 170
Calculation steps:
[( 170 - 238 ) ÷ 238] x 100 = -28.57%
Formula
Percentage change = [(170 - 238) / 238] x 100
Subtract the new number by the original number
170 - 238 = -68
-68 ÷ 238 = -0.2857142857142857
-0.2857142857142857 x 100 = -28.57%