-48.92% is the change from 139 to 71
Calculation steps:
[( 71 - 139 ) ÷ 139] x 100 = -48.92%
Formula
Percentage change = [(71 - 139) / 139] x 100
Subtract the new number by the original number
71 - 139 = -68
-68 ÷ 139 = -0.4892086330935252
-0.4892086330935252 x 100 = -48.92%