-25.49% is the change from 663 to 494
Calculation steps:
[( 494 - 663 ) ÷ 663] x 100 = -25.49%
Formula
Percentage change = [(494 - 663) / 663] x 100
Subtract the new number by the original number
494 - 663 = -169
-169 ÷ 663 = -0.2549019607843137
-0.2549019607843137 x 100 = -25.49%