-27.9% is the change from 663 to 478
Calculation steps:
[( 478 - 663 ) ÷ 663] x 100 = -27.9%
Formula
Percentage change = [(478 - 663) / 663] x 100
Subtract the new number by the original number
478 - 663 = -185
-185 ÷ 663 = -0.2790346907993967
-0.2790346907993967 x 100 = -27.9%