-33.82% is the change from 340 to 225
Calculation steps:
[( 225 - 340 ) ÷ 340] x 100 = -33.82%
Formula
Percentage change = [(225 - 340) / 340] x 100
Subtract the new number by the original number
225 - 340 = -115
-115 ÷ 340 = -0.3382352941176471
-0.3382352941176471 x 100 = -33.82%