-84.89% is the change from 139 to 21
Calculation steps:
[( 21 - 139 ) ÷ 139] x 100 = -84.89%
Formula
Percentage change = [(21 - 139) / 139] x 100
Subtract the new number by the original number
21 - 139 = -118
-118 ÷ 139 = -0.8489208633093526
-0.8489208633093526 x 100 = -84.89%