-87.32% is the change from 497 to 63
Calculation steps:
[( 63 - 497 ) ÷ 497] x 100 = -87.32%
Formula
Percentage change = [(63 - 497) / 497] x 100
Subtract the new number by the original number
63 - 497 = -434
-434 ÷ 497 = -0.8732394366197183
-0.8732394366197183 x 100 = -87.32%