-93.76% is the change from 497 to 31
Calculation steps:
[( 31 - 497 ) ÷ 497] x 100 = -93.76%
Formula
Percentage change = [(31 - 497) / 497] x 100
Subtract the new number by the original number
31 - 497 = -466
-466 ÷ 497 = -0.937625754527163
-0.937625754527163 x 100 = -93.76%