-29.25% is the change from 318 to 225
Calculation steps:
[( 225 - 318 ) ÷ 318] x 100 = -29.25%
Formula
Percentage change = [(225 - 318) / 318] x 100
Subtract the new number by the original number
225 - 318 = -93
-93 ÷ 318 = -0.29245283018867924
-0.29245283018867924 x 100 = -29.25%