-90.63% is the change from 224 to 21
Calculation steps:
[( 21 - 224 ) ÷ 224] x 100 = -90.63%
Formula
Percentage change = [(21 - 224) / 224] x 100
Subtract the new number by the original number
21 - 224 = -203
-203 ÷ 224 = -0.90625
-0.90625 x 100 = -90.63%