-77.74% is the change from 665 to 148
Calculation steps:
[( 148 - 665 ) ÷ 665] x 100 = -77.74%
Formula
Percentage change = [(148 - 665) / 665] x 100
Subtract the new number by the original number
148 - 665 = -517
-517 ÷ 665 = -0.7774436090225564
-0.7774436090225564 x 100 = -77.74%