-75.15% is the change from 660 to 164
Calculation steps:
[( 164 - 660 ) ÷ 660] x 100 = -75.15%
Formula
Percentage change = [(164 - 660) / 660] x 100
Subtract the new number by the original number
164 - 660 = -496
-496 ÷ 660 = -0.7515151515151515
-0.7515151515151515 x 100 = -75.15%