-72.39% is the change from 815 to 225
Calculation steps:
[( 225 - 815 ) ÷ 815] x 100 = -72.39%
Formula
Percentage change = [(225 - 815) / 815] x 100
Subtract the new number by the original number
225 - 815 = -590
-590 ÷ 815 = -0.7239263803680982
-0.7239263803680982 x 100 = -72.39%