-54.87% is the change from 308 to 139
Calculation steps:
[( 139 - 308 ) ÷ 308] x 100 = -54.87%
Formula
Percentage change = [(139 - 308) / 308] x 100
Subtract the new number by the original number
139 - 308 = -169
-169 ÷ 308 = -0.5487012987012987
-0.5487012987012987 x 100 = -54.87%