-99.24% is the change from 660 to 5
Calculation steps:
[( 5 - 660 ) ÷ 660] x 100 = -99.24%
Formula
Percentage change = [(5 - 660) / 660] x 100
Subtract the new number by the original number
5 - 660 = -655
-655 ÷ 660 = -0.9924242424242424
-0.9924242424242424 x 100 = -99.24%