-52.65% is the change from 340 to 161
Calculation steps:
[( 161 - 340 ) ÷ 340] x 100 = -52.65%
Formula
Percentage change = [(161 - 340) / 340] x 100
Subtract the new number by the original number
161 - 340 = -179
-179 ÷ 340 = -0.5264705882352941
-0.5264705882352941 x 100 = -52.65%