-91.37% is the change from 139 to 12
Calculation steps:
[( 12 - 139 ) ÷ 139] x 100 = -91.37%
Formula
Percentage change = [(12 - 139) / 139] x 100
Subtract the new number by the original number
12 - 139 = -127
-127 ÷ 139 = -0.9136690647482014
-0.9136690647482014 x 100 = -91.37%