-18.18% is the change from 275 to 225
Calculation steps:
[( 225 - 275 ) ÷ 275] x 100 = -18.18%
Formula
Percentage change = [(225 - 275) / 275] x 100
Subtract the new number by the original number
225 - 275 = -50
-50 ÷ 275 = -0.18181818181818182
-0.18181818181818182 x 100 = -18.18%