-83.3% is the change from 497 to 83
Calculation steps:
[( 83 - 497 ) ÷ 497] x 100 = -83.3%
Formula
Percentage change = [(83 - 497) / 497] x 100
Subtract the new number by the original number
83 - 497 = -414
-414 ÷ 497 = -0.8329979879275654
-0.8329979879275654 x 100 = -83.3%