-18.31% is the change from 497 to 406
Calculation steps:
[( 406 - 497 ) ÷ 497] x 100 = -18.31%
Formula
Percentage change = [(406 - 497) / 497] x 100
Subtract the new number by the original number
406 - 497 = -91
-91 ÷ 497 = -0.18309859154929578
-0.18309859154929578 x 100 = -18.31%