-96.4% is the change from 667 to 24
Calculation steps:
[( 24 - 667 ) ÷ 667] x 100 = -96.4%
Formula
Percentage change = [(24 - 667) / 667] x 100
Subtract the new number by the original number
24 - 667 = -643
-643 ÷ 667 = -0.9640179910044977
-0.9640179910044977 x 100 = -96.4%