-41.65% is the change from 665 to 388
Calculation steps:
[( 388 - 665 ) ÷ 665] x 100 = -41.65%
Formula
Percentage change = [(388 - 665) / 665] x 100
Subtract the new number by the original number
388 - 665 = -277
-277 ÷ 665 = -0.41654135338345866
-0.41654135338345866 x 100 = -41.65%