-38.79% is the change from 660 to 404
Calculation steps:
[( 404 - 660 ) ÷ 660] x 100 = -38.79%
Formula
Percentage change = [(404 - 660) / 660] x 100
Subtract the new number by the original number
404 - 660 = -256
-256 ÷ 660 = -0.3878787878787879
-0.3878787878787879 x 100 = -38.79%