-22.42% is the change from 660 to 512
Calculation steps:
[( 512 - 660 ) ÷ 660] x 100 = -22.42%
Formula
Percentage change = [(512 - 660) / 660] x 100
Subtract the new number by the original number
512 - 660 = -148
-148 ÷ 660 = -0.22424242424242424
-0.22424242424242424 x 100 = -22.42%