-83.1% is the change from 497 to 84
Calculation steps:
[( 84 - 497 ) ÷ 497] x 100 = -83.1%
Formula
Percentage change = [(84 - 497) / 497] x 100
Subtract the new number by the original number
84 - 497 = -413
-413 ÷ 497 = -0.8309859154929577
-0.8309859154929577 x 100 = -83.1%