-97.79% is the change from 497 to 11
Calculation steps:
[( 11 - 497 ) ÷ 497] x 100 = -97.79%
Formula
Percentage change = [(11 - 497) / 497] x 100
Subtract the new number by the original number
11 - 497 = -486
-486 ÷ 497 = -0.9778672032193159
-0.9778672032193159 x 100 = -97.79%