-79.86% is the change from 139 to 28
Calculation steps:
[( 28 - 139 ) ÷ 139] x 100 = -79.86%
Formula
Percentage change = [(28 - 139) / 139] x 100
Subtract the new number by the original number
28 - 139 = -111
-111 ÷ 139 = -0.7985611510791367
-0.7985611510791367 x 100 = -79.86%