-34.78% is the change from 345 to 225
Calculation steps:
[( 225 - 345 ) ÷ 345] x 100 = -34.78%
Formula
Percentage change = [(225 - 345) / 345] x 100
Subtract the new number by the original number
225 - 345 = -120
-120 ÷ 345 = -0.34782608695652173
-0.34782608695652173 x 100 = -34.78%