-4.13% is the change from 218 to 209
Calculation steps:
[( 209 - 218 ) ÷ 218] x 100 = -4.13%
Formula
Percentage change = [(209 - 218) / 218] x 100
Subtract the new number by the original number
209 - 218 = -9
-9 ÷ 218 = -0.04128440366972477
-0.04128440366972477 x 100 = -4.13%