-64.71% is the change from 340 to 120
Calculation steps:
[( 120 - 340 ) ÷ 340] x 100 = -64.71%
Formula
Percentage change = [(120 - 340) / 340] x 100
Subtract the new number by the original number
120 - 340 = -220
-220 ÷ 340 = -0.6470588235294118
-0.6470588235294118 x 100 = -64.71%