-59.12% is the change from 340 to 139
Calculation steps:
[( 139 - 340 ) ÷ 340] x 100 = -59.12%
Formula
Percentage change = [(139 - 340) / 340] x 100
Subtract the new number by the original number
139 - 340 = -201
-201 ÷ 340 = -0.5911764705882353
-0.5911764705882353 x 100 = -59.12%