-24% is the change from 225 to 171
Calculation steps:
[( 171 - 225 ) ÷ 225] x 100 = -24%
Formula
Percentage change = [(171 - 225) / 225] x 100
Subtract the new number by the original number
171 - 225 = -54
-54 ÷ 225 = -0.24
-0.24 x 100 = -24%
Example