-56.12% is the change from 139 to 61
Calculation steps:
[( 61 - 139 ) ÷ 139] x 100 = -56.12%
Formula
Percentage change = [(61 - 139) / 139] x 100
Subtract the new number by the original number
61 - 139 = -78
-78 ÷ 139 = -0.5611510791366906
-0.5611510791366906 x 100 = -56.12%