-97.8% is the change from 499 to 11
Calculation steps:
[( 11 - 499 ) ÷ 499] x 100 = -97.8%
Formula
Percentage change = [(11 - 499) / 499] x 100
Subtract the new number by the original number
11 - 499 = -488
-488 ÷ 499 = -0.9779559118236473
-0.9779559118236473 x 100 = -97.8%