-53.24% is the change from 340 to 159
Calculation steps:
[( 159 - 340 ) ÷ 340] x 100 = -53.24%
Formula
Percentage change = [(159 - 340) / 340] x 100
Subtract the new number by the original number
159 - 340 = -181
-181 ÷ 340 = -0.5323529411764706
-0.5323529411764706 x 100 = -53.24%