-41.18% is the change from 663 to 390
Calculation steps:
[( 390 - 663 ) ÷ 663] x 100 = -41.18%
Formula
Percentage change = [(390 - 663) / 663] x 100
Subtract the new number by the original number
390 - 663 = -273
-273 ÷ 663 = -0.4117647058823529
-0.4117647058823529 x 100 = -41.18%