-25.3% is the change from 668 to 499
Calculation steps:
[( 499 - 668 ) ÷ 668] x 100 = -25.3%
Formula
Percentage change = [(499 - 668) / 668] x 100
Subtract the new number by the original number
499 - 668 = -169
-169 ÷ 668 = -0.25299401197604793
-0.25299401197604793 x 100 = -25.3%