-8.79% is the change from 239 to 218
Calculation steps:
[( 218 - 239 ) ÷ 239] x 100 = -8.79%
Formula
Percentage change = [(218 - 239) / 239] x 100
Subtract the new number by the original number
218 - 239 = -21
-21 ÷ 239 = -0.08786610878661087
-0.08786610878661087 x 100 = -8.79%