-53.96% is the change from 139 to 64
Calculation steps:
[( 64 - 139 ) ÷ 139] x 100 = -53.96%
Formula
Percentage change = [(64 - 139) / 139] x 100
Subtract the new number by the original number
64 - 139 = -75
-75 ÷ 139 = -0.539568345323741
-0.539568345323741 x 100 = -53.96%