-88.26% is the change from 673 to 79
Calculation steps:
[( 79 - 673 ) ÷ 673] x 100 = -88.26%
Formula
Percentage change = [(79 - 673) / 673] x 100
Subtract the new number by the original number
79 - 673 = -594
-594 ÷ 673 = -0.8826151560178306
-0.8826151560178306 x 100 = -88.26%