-1.82% is the change from 220 to 216
Calculation steps:
[( 216 - 220 ) ÷ 220] x 100 = -1.82%
Formula
Percentage change = [(216 - 220) / 220] x 100
Subtract the new number by the original number
216 - 220 = -4
-4 ÷ 220 = -0.01818181818181818
-0.01818181818181818 x 100 = -1.82%