-39.88% is the change from 499 to 300
Calculation steps:
[( 300 - 499 ) ÷ 499] x 100 = -39.88%
Formula
Percentage change = [(300 - 499) / 499] x 100
Subtract the new number by the original number
300 - 499 = -199
-199 ÷ 499 = -0.39879759519038077
-0.39879759519038077 x 100 = -39.88%