-88.16% is the change from 667 to 79
Calculation steps:
[( 79 - 667 ) ÷ 667] x 100 = -88.16%
Formula
Percentage change = [(79 - 667) / 667] x 100
Subtract the new number by the original number
79 - 667 = -588
-588 ÷ 667 = -0.881559220389805
-0.881559220389805 x 100 = -88.16%