-78.16% is the change from 499 to 109
Calculation steps:
[( 109 - 499 ) ÷ 499] x 100 = -78.16%
Formula
Percentage change = [(109 - 499) / 499] x 100
Subtract the new number by the original number
109 - 499 = -390
-390 ÷ 499 = -0.781563126252505
-0.781563126252505 x 100 = -78.16%