-49.62% is the change from 663 to 334
Calculation steps:
[( 334 - 663 ) ÷ 663] x 100 = -49.62%
Formula
Percentage change = [(334 - 663) / 663] x 100
Subtract the new number by the original number
334 - 663 = -329
-329 ÷ 663 = -0.4962292609351433
-0.4962292609351433 x 100 = -49.62%