-33.8% is the change from 497 to 329
Calculation steps:
[( 329 - 497 ) ÷ 497] x 100 = -33.8%
Formula
Percentage change = [(329 - 497) / 497] x 100
Subtract the new number by the original number
329 - 497 = -168
-168 ÷ 497 = -0.3380281690140845
-0.3380281690140845 x 100 = -33.8%