-93.33% is the change from 225 to 15
Calculation steps:
[( 15 - 225 ) ÷ 225] x 100 = -93.33%
Formula
Percentage change = [(15 - 225) / 225] x 100
Subtract the new number by the original number
15 - 225 = -210
-210 ÷ 225 = -0.9333333333333333
-0.9333333333333333 x 100 = -93.33%