-21.01% is the change from 238 to 188
Calculation steps:
[( 188 - 238 ) ÷ 238] x 100 = -21.01%
Formula
Percentage change = [(188 - 238) / 238] x 100
Subtract the new number by the original number
188 - 238 = -50
-50 ÷ 238 = -0.21008403361344538
-0.21008403361344538 x 100 = -21.01%