-88.45% is the change from 684 to 79
Calculation steps:
[( 79 - 684 ) ÷ 684] x 100 = -88.45%
Formula
Percentage change = [(79 - 684) / 684] x 100
Subtract the new number by the original number
79 - 684 = -605
-605 ÷ 684 = -0.8845029239766082
-0.8845029239766082 x 100 = -88.45%