-87.5% is the change from 224 to 28
Calculation steps:
[( 28 - 224 ) ÷ 224] x 100 = -87.5%
Formula
Percentage change = [(28 - 224) / 224] x 100
Subtract the new number by the original number
28 - 224 = -196
-196 ÷ 224 = -0.875
-0.875 x 100 = -87.5%
Example