-79.88% is the change from 691 to 139
Calculation steps:
[( 139 - 691 ) ÷ 691] x 100 = -79.88%
Formula
Percentage change = [(139 - 691) / 691] x 100
Subtract the new number by the original number
139 - 691 = -552
-552 ÷ 691 = -0.7988422575976846
-0.7988422575976846 x 100 = -79.88%