-88.38% is the change from 680 to 79
Calculation steps:
[( 79 - 680 ) ÷ 680] x 100 = -88.38%
Formula
Percentage change = [(79 - 680) / 680] x 100
Subtract the new number by the original number
79 - 680 = -601
-601 ÷ 680 = -0.8838235294117647
-0.8838235294117647 x 100 = -88.38%