-30.56% is the change from 324 to 225
Calculation steps:
[( 225 - 324 ) ÷ 324] x 100 = -30.56%
Formula
Percentage change = [(225 - 324) / 324] x 100
Subtract the new number by the original number
225 - 324 = -99
-99 ÷ 324 = -0.3055555555555556
-0.3055555555555556 x 100 = -30.56%