-12.39% is the change from 218 to 191
Calculation steps:
[( 191 - 218 ) ÷ 218] x 100 = -12.39%
Formula
Percentage change = [(191 - 218) / 218] x 100
Subtract the new number by the original number
191 - 218 = -27
-27 ÷ 218 = -0.12385321100917432
-0.12385321100917432 x 100 = -12.39%