-79.35% is the change from 673 to 139
Calculation steps:
[( 139 - 673 ) ÷ 673] x 100 = -79.35%
Formula
Percentage change = [(139 - 673) / 673] x 100
Subtract the new number by the original number
139 - 673 = -534
-534 ÷ 673 = -0.7934621099554234
-0.7934621099554234 x 100 = -79.35%