-41.32% is the change from 668 to 392
Calculation steps:
[( 392 - 668 ) ÷ 668] x 100 = -41.32%
Formula
Percentage change = [(392 - 668) / 668] x 100
Subtract the new number by the original number
392 - 668 = -276
-276 ÷ 668 = -0.41317365269461076
-0.41317365269461076 x 100 = -41.32%