-88.5% is the change from 687 to 79
Calculation steps:
[( 79 - 687 ) ÷ 687] x 100 = -88.5%
Formula
Percentage change = [(79 - 687) / 687] x 100
Subtract the new number by the original number
79 - 687 = -608
-608 ÷ 687 = -0.8850072780203785
-0.8850072780203785 x 100 = -88.5%