-59.28% is the change from 663 to 270
Calculation steps:
[( 270 - 663 ) ÷ 663] x 100 = -59.28%
Formula
Percentage change = [(270 - 663) / 663] x 100
Subtract the new number by the original number
270 - 663 = -393
-393 ÷ 663 = -0.5927601809954751
-0.5927601809954751 x 100 = -59.28%