-63.31% is the change from 139 to 51
Calculation steps:
[( 51 - 139 ) ÷ 139] x 100 = -63.31%
Formula
Percentage change = [(51 - 139) / 139] x 100
Subtract the new number by the original number
51 - 139 = -88
-88 ÷ 139 = -0.6330935251798561
-0.6330935251798561 x 100 = -63.31%