-96.18% is the change from 497 to 19
Calculation steps:
[( 19 - 497 ) ÷ 497] x 100 = -96.18%
Formula
Percentage change = [(19 - 497) / 497] x 100
Subtract the new number by the original number
19 - 497 = -478
-478 ÷ 497 = -0.9617706237424547
-0.9617706237424547 x 100 = -96.18%