-98.18% is the change from 220 to 4
Calculation steps:
[( 4 - 220 ) ÷ 220] x 100 = -98.18%
Formula
Percentage change = [(4 - 220) / 220] x 100
Subtract the new number by the original number
4 - 220 = -216
-216 ÷ 220 = -0.9818181818181818
-0.9818181818181818 x 100 = -98.18%