-38.68% is the change from 499 to 306
Calculation steps:
[( 306 - 499 ) ÷ 499] x 100 = -38.68%
Formula
Percentage change = [(306 - 499) / 499] x 100
Subtract the new number by the original number
306 - 499 = -193
-193 ÷ 499 = -0.3867735470941884
-0.3867735470941884 x 100 = -38.68%