-5.5% is the change from 218 to 206
Calculation steps:
[( 206 - 218 ) ÷ 218] x 100 = -5.5%
Formula
Percentage change = [(206 - 218) / 218] x 100
Subtract the new number by the original number
206 - 218 = -12
-12 ÷ 218 = -0.05504587155963303
-0.05504587155963303 x 100 = -5.5%