-67.94% is the change from 340 to 109
Calculation steps:
[( 109 - 340 ) ÷ 340] x 100 = -67.94%
Formula
Percentage change = [(109 - 340) / 340] x 100
Subtract the new number by the original number
109 - 340 = -231
-231 ÷ 340 = -0.6794117647058824
-0.6794117647058824 x 100 = -67.94%