-6.36% is the change from 220 to 206
Calculation steps:
[( 206 - 220 ) ÷ 220] x 100 = -6.36%
Formula
Percentage change = [(206 - 220) / 220] x 100
Subtract the new number by the original number
206 - 220 = -14
-14 ÷ 220 = -0.06363636363636363
-0.06363636363636363 x 100 = -6.36%