-55.31% is the change from 311 to 139
Calculation steps:
[( 139 - 311 ) ÷ 311] x 100 = -55.31%
Formula
Percentage change = [(139 - 311) / 311] x 100
Subtract the new number by the original number
139 - 311 = -172
-172 ÷ 311 = -0.5530546623794212
-0.5530546623794212 x 100 = -55.31%